The Guild of One Name Studies sent me an email lately which told me of a website that I did not know about before. The website is for the Commonwealth War Graves Commission.
A search for the Brennan family name gave me 462 results.
343 who served with the United Kingdom Forces
64 with the Australian Forces
12 with the New Zealand Forces
40 with the Canadian Forces
3 with the South African Forces

6 of the records are for soldiers commemorated in Ireland
Francis A Brennan Service Number 25244 of the Royal Dublin Fusiliers died 1916
John Brennan Service Number 9952 of the Royal Irish Regiment died 1916
John Brennan Service Number 27864 of the Royal Welsh Fusiliers died 1918
John Brennan Service Number 24999 of the Royal Dublin Fusiliers died 1918
Moses Brennan Seaman of the Merchant Navy died 1940
Thomas Joseph Brennan Service Number 1835395 of the Royal Artillery died 1941

Moses Brennan is such an unusual name that I couldn't help but do a quick search to see if I could find him.
I found a Moses Brennan, son of Edward Brennan and Kate Roche born on March 7th, 1898 at Trimmer's Lane, Wexford. In the 1901 Census Moses aged 3 was living with his parents Edward & Catherine and siblings, Patrick, Edward (Moses twin), and Katie. Moses uncle John is recorded as a sailor. By 1911, Moss mother is recorded as having birthed 10 children of whom only 5 are living.
In 1922, Moses, occupation Sailor, married Alice Doran of Scholar Street., Wexford.

Sources
Commonwealth War Graves Commisssion
www.cwgc.org/find-war-dead.aspx?cpage=1
Birth Cert 1898
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1898/02092/1797786.pdf
​1901 Census Wexford
​www.census.nationalarchives.ie/pages/1901/Wexford/Wexford_Urban/Trimmer_s_Lane_West/1806473/
​1911 Census Wexford
​www.census.nationalarchives.ie/pages/1911/Wexford/Wexford_No__3_Urban/Trimmers_Lane_West/698213/
1922 Marriage
 civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1922/09212/5332567.pdf 

UPDATED 31/8/2017
If you or one of your Kerry parents has the surname Brennan, an autosomal DNA test kit has been donated to assist those researching their Kerry Brennan ancestry. Please leave a comment below and I will get back to you.

In 1901, 563 Kerry people bore the Brennan family name.
97 households had a Brennan listed as the Head of Household.
​Brennan households are listed by townland & DED as spelled in the 1901 Census in alphabetical order. In some cases I have added information in the index below which may help you to more easily identify your ancestor, for example if they were not born in Kerry, had an unusual occupation or religion.
Whilst every effort has been made to ensure the accuracy of this piece of research mistakes may have occurred. If you are aware of any or have more information to add please let me know in the comments box below. Please include online links. This is a work in progress and will be updated as I have further information!
Martine

Abbeydorney, Abbeydorney
Julia Brennan, married, Seamstress, Mahony marriage to Patrick Brennan Feb 17 1874 Abbeydorney
PATRICK BRENNAN JULIA MAHONY
Address GLENCAGH GLANCAGH
Father EDMUND BRENNAN PATRICK MAHONY
Mother MARY CONNOR JULIA SAVAGE
www.census.nationalarchives.ie/pages/1901/Kerry/Abbeydorney/Abbeydorney/1425203/
​Died July 6 1907 Brother Patrick Mahony present at death
​civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1907/05518/4546721.pdf

Aghort, St. Finans
Michael Brennan & his wife Mary Reardon as recorded in baptism record of son Patrick March 14 1870
www.census.nationalarchives.ie/pages/1901/Kerry/St__Finans/Aghort/1405770/ 

Patrick Brennan & his wife Mary Moriarty as recorded in baptism of son Michael baptism Sept 9 1872
www.census.nationalarchives.ie/pages/1901/Kerry/St__Finans/Aghort/1405769/

Ahabeg, Kiltomy
​Patrick Brennan & wife Mary Browne m 1894 Listowel
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1894/10557/5845850.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Kiltomy/Ahabeg_East/1420867/

Ardmore, Castlecove
John Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Ardmore/1411342/
​In 1852, there is a Mary Brennan renting land at Ardmore, Kilcrohane Civil Parish from Michael Burns.

Ballindooganig, Ballyseeedy
Margaret Brennan, married~husband Daniel wife Margaret Marshall as per bapt of son John April 5th 1891 
www.census.nationalarchives.ie/pages/1901/Kerry/Ballyseedy/Ballindooganig/1429331/

Baltovin, Killahin
John Brennan & his wife Mary Egan m Feb 14 1885 Ardfert
Name JOHN BRENNAN MARY EGAN
Address BALTOVIN LERRIG
Occupation NRNR
Father MAURICE BRENNAN MAURICE EGAN
www.census.nationalarchives.ie/pages/1901/Kerry/Killahan/Baltovin/1426035/
​If you are researching this family do make use of the fact that they had a son called Solomon born c.1893

Ballydarrig, Castlequin
Daniel & his wife Katherine Keating m Feb 9 1875 Caherciveen
Name DANIEL BRENAN KATE KEATING
Address BALLYDARRIG CORIGROUR
Father MICHAEL BRENAN JOHN KEATING
www.census.nationalarchives.ie/pages/1901/Kerry/Castlequin/Ballydarrig/1404053/

John Brennan & wife Mary Griffin as per birth of son Michael Dec 25th 1899
www.census.nationalarchives.ie/pages/1901/Kerry/Castlequin/Ballydarrig/1404055/
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1900/02001/1769475.pdf

Ballymacandrew North, Ballynorig
James Brennan & wife Hanoria Slattery m Jan. 27 1885 in Ardfert
Name JAMES BRENNAN HONORA SLATTERY
Address BALLYMACANDREW BALLYIMKIN
Occupation NRNR
Father DENIS BRENNAN CHARLES SLATTERY
www.census.nationalarchives.ie/pages/1901/Kerry/Ballynorig/Ballymacandrew_North/1425575/ 

Ballymalis, Kilbonane
Cornelius Brennan & wife Mary poss mar Fermoy 1873
www.census.nationalarchives.ie/pages/1901/Kerry/Kilbonane/Ballymalis/1417558/
Daughter Catherine m Michael Doody Oct 26 1893 Miltown
Name DENIS DOODY CATHERINE BRENNAN
Address KILLARNY BALLYMALIS
Father MICHAEL DOODYCORNELIUS BRENNAN
​
Beenbane, Loughcurrane
James Brennan & his wife Norah Sullivan as per bapt cert of son Martin Sept. 11 1879
www.census.nationalarchives.ie/pages/1901/Kerry/Loughcurrane/Beenbane/1404726/

Behaghane, Caherdaniel
Andrew Brennan  & his wife Ellen Fitzgerald m 1883 Cahirciveen
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1883/10930/5993329.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Behaghane/1404435/
​
Mary Brennan, of Behaghane, Caherdaniel, a widow.
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Behaghane/1404422/

James J Brennan, a widower
son John & wife Mary Leary m 1895 Cahirciveen
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1895/10521/5832080.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Behaghane/1404423/


Brackaharagh, Caherdaniel
John P Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Brackaharagh/1404467/

Mary Brennan, widow
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Brackaharagh/1404468/

Bridewell St., Tarbert
Patrick Brennan birthplace Fermanagh & wife Margret McEvoy m Nov. 13 1873 Tarbert
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Brackaharagh/1404468/
​PATRICK BRENNAN MARGARET MCEVOY
Address TARBERT ISLAND DOONARD
Occupation NRNR
Father PATRICK BRENNAN JAMES MCEVOY

Patrick Brennan RIC & wife Nora birthplace Co. Clare~ Neylan m Kildysart Jul 31st 1897
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1897/10465/5811062.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Tarbert/Bridewell_Street/1424793/
​Birth of dau Mary A JUl 12th 1898
​civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1898/02067/1789992.pdf
​
Canuig, Ballinskelligs
James Brennan & his wife Nora poss Sugrue as per bapt of dau Catherine June 18th 1871 
www.census.nationalarchives.ie/pages/1901/Kerry/Ballinskelligs/Canuig/1405003/
​

Capparoe, Dromore
Belinda Brennan, a widow, COI
www.census.nationalarchives.ie/pages/1901/Kerry/Dromore/Capparoe/1410147/

Charles St., Listowel Urban
Michael Brennan age 25? & wife Mary age 60? need to check this
www.census.nationalarchives.ie/pages/1901/Kerry/Listowel_Urban/Charles_Street/1423392/

Chapel St., Caher
Daniel Brennan & wife M
www.census.nationalarchives.ie/pages/1901/Kerry/Caher/Chapel_Street/1403560/

Clashatlea, Arabella
Denis Brennan & wife Johanna Collins m 1889
www.census.nationalarchives.ie/pages/1901/Kerry/Arabela/Clashatlea/1429193/
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1889/10730/5912165.pdf
​

Cloonafineela, Kilflynn
Hanoria Brennan, widow, Hanoria Stack & Thomas Brennan as per bapt of son Robert Nov 17th 1878 Abbeydorney ??
www.census.nationalarchives.ie/pages/1901/Kerry/Kilflyn/Cloonnafinneela/1429602/
​Death of Thomas Brennan, Kilflynn 1900 but wife's name does not match
​civilrecords.irishgenealogy.ie/churchrecords/images/deaths_returns/deaths_1900/05757/4626403.pdf

Coomnahorna West, Caherdaniel
Patrick & his wife Bridget poss Black or Stack?? as per 1887 birth cert of dau Johanna
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1887/02543/1941242.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Caherdaniel/Coomnahorna_West/1404518/

Coomnakilla North, Dromore
James & his wife Mary Connor as per bapt cert of son Timothy Dec 31st 1887
www.census.nationalarchives.ie/pages/1901/Kerry/Dromore/Coomnakilla_North/1410163/

Cromane Upper, Killorglin
Daniel & his wife Hannah Connor m Mar 7th 1886
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Cromane_Upper/1416754/
​DANIEL BRENNAN JOHANNA CONNOR
Address CROMANE LOUGHEEGANAVANE
Father MICHAEL NR TIMOTHY NR
Mother ELLEN MORIARTY MARY MANGAN

Derra west, Gunsborough
Johanna (John) Brennan & wife Johanna 
www.census.nationalarchives.ie/pages/1901/Kerry/Gunsborough/Derra_West/1422178/

Derreen, Ardea
George Roland Brennan & wife Annie Mansfield m 1891
www.census.nationalarchives.ie/pages/1901/Kerry/Ardea/Derreen/1412157/
​civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1891/10671/5888946.pdf
​
Derreen, Derriana
James Brennan & his wife Bridget Courtney m Feb 27th 1892
JAMES BRENNAN BRIDGET COURTNEY
Address DOORA DIRREEN
FatherJEREMIAH BRENNAN HUMPHREY COURTNEY
www.census.nationalarchives.ie/pages/1901/Kerry/Derriana/Derreen/1405345/

Derreenauliff, Castlecove
Patrick & his wife Ellen Fitzgerald as per bapt of son Bartholemew Mar 31st 1889
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Derreenauliff/1411378/

Derreenavurrig, Castlecove
James Brennan & his wife Johanna
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Derreenavurrig/1411403/

Dungeagan, Ballinskelligs
Mary Brennan, widow, son Denis Curran
www.census.nationalarchives.ie/pages/1901/Kerry/Ballinskelligs/Dungeagan/1405080/

Doory, Cloon
Patrick Brennan & his wife Mary Murphy as per bapt of dau Helen Feb 11th 1895
www.census.nationalarchives.ie/pages/1901/Kerry/Cloon/Doory/1405730/

Dromin East, Dromin
Catherine Brennan, widow, maiden name Sullivan
​www.census.nationalarchives.ie/pages/1901/Kerry/Dromin/Dromin_East/1417511/

Dromkeare, Loughcurrane
Michael Brennan, widower
www.census.nationalarchives.ie/pages/1901/Kerry/Loughcurrane/Dromkeare/1404802/

Fairfield, Caher
Mary Brennan, widow, sons Patrick Hoare & John Lynch & dau Johanna McCarthy all single
www.census.nationalarchives.ie/pages/1901/Kerry/Caher/Fairfield/1403627/

Farranreagh, Knightstown, Valentia
Michael & his wife Nora
www.census.nationalarchives.ie/pages/1901/Kerry/Valentia/Farranreagh___Knightstown/1407226/

Garrahadoo, Killorglin
John Brennan & his wife Anne Collins m Feb 18th 1890 
JOHN BRENNAN ANN COLLINS
Address KILLORGLIN CLASHATLEA
Father DENIS BRENNAN JOHN COLLINS
​Mother JOHANNA SULLIVAN JOHANNA BROSNAN
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Garrahadoo/1416886/

Glanlough Lower, Castlecove
Michael Brennan & his wife Mary Sullivan as per bapt of son James Mar 29th 1891 Sneem 
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Glanlough_Lower/1411453/
Patrick Brennan & his wife Abbie/Abigail McCarthy as per bapt of son Patrick Jan 11th 1888 Sneem
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Glanlough_Lower/1411457/
Denis Brennan & wife Mary Leary as per bapt of dau Julia Mar 1st 1890 
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Glanlough_Lower/1411451/


Gleesk, Castlecove
Patrick & his wife Hanora
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Gleesk/1411476/
​
Ellen Brennan, widow maiden name McCarthy, as per birth of son Stephen Dec 10 1885 Kenmare, husband John
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1886/02608/1963232.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Castlecove/Gleesk/1411477/

Gortacrossane, Ennismore
Patrick Brennan & his wife Johanna
www.census.nationalarchives.ie/pages/1901/Kerry/Ennismore/Gortacrossane/1421255/

Graigues, Ballybrack
John Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Ballybrack/Graigues/1404360/
​
Guhard North, Lisselton
John Brennan & his wife Margaret
www.census.nationalarchives.ie/pages/1901/Kerry/Lisselton/Guhard_North/1422499/
Mary Brennan, widow

Gurrane East, Killorglin
James Brennan, single, Patrick Brosnan, brother in law
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Gurrane_East/1416898/
Mary Brennan, a widow, grandaughter Ellie Lyons
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Gurrane_East/1416899/
John Brennan & his wife Hannah
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Gurrane_East/1416897/
Johannah Brennan, widow, niece Ellen Riordan
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Gurrane_East/1416896/

Gurrane West, Killorglin
Michael & his wife Bridget Sheehan
www.census.nationalarchives.ie/pages/1901/Kerry/Killorglin/Gurrane_West/1416948/

Gortagurrane West, Ballyconry
Phillip Brennan, widower, son in law John Lanlee
www.census.nationalarchives.ie/pages/1901/Kerry/Ballyconry/Gortagurrane_West/1419362/

High St., Caher
Michael Brennan & wife Bridget
www.census.nationalarchives.ie/pages/1901/Kerry/Caher/High_Street/1403639/

Kenmare, Kenmare
John Brennan, land surveyor, born at sea, Christian known as Brethern & wife Maria Elizabeth
www.census.nationalarchives.ie/pages/1901/Kerry/Kenmare/Kenmare/1410444/


Killabuonia, St. Finans
Michael Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/St__Finans/Killabuonia/1405796/

Killaha East, Dawros
Jane Brennan, single
​www.census.nationalarchives.ie/pages/1901/Kerry/Dawros/Killaha_East/1412474/

Killaha West, Dawros
John Brennan & his wife Bridget
www.census.nationalarchives.ie/pages/1901/Kerry/Dawros/Killaha_West/1412487/

Kilfenora, Ballynahaglish
Daniel Brennan born Tipperary & his wife Mary Lawlor
www.martinebrennan.com/the-brennan-blog/daniel-brennan-tipperary-born-c-1840
www.census.nationalarchives.ie/pages/1901/Kerry/Ballynahaglish/Kilfenora/1430742/
​

Kilgortaree, Cappagh
Denis Brennan & his wife Margaret
www.census.nationalarchives.ie/pages/1901/Kerry/Cappagh/Kilgortaree/1410911/

Kinard East, Ballinskelligs
Patrick Brennan, single
www.census.nationalarchives.ie/pages/1901/Kerry/Ballinskelligs/Kinard_East/1405126/

Knockeenawaddra, Portmagee
Peter Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Portmagee/Knockeenawaddra/1406802/

Knockreagh, Tubrid
Thomas & his wife Maggie Hayes m Feb 26 1884 Abbeydorney
Name THOMAS BRENNAN MARGARET HAYES
Address GLOUNCAGH DROUMCUNNIG
Father EUGENE BRENNAN MAURICE HAYES
Mother MARY OCONNOR BRIDGET WALSH
www.census.nationalarchives.ie/pages/1901/Kerry/Tubrid/Knockreagh/1426278/

Knockroe, Bahaghs
Hanoria, widow
www.census.nationalarchives.ie/pages/1901/Kerry/Bahaghs/Knockroe/1403189/

Lacka East, Urlee
Michael Brennan & wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Urlee/Lacka__East/1419988/
​Dau Catherine m John Lucid 1892 Listowel
​civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1892/10646/5878975.pdf

Bridget Brennan, widow
www.census.nationalarchives.ie/pages/1901/Kerry/Urlee/Lacka__East/1419985/
​
Eugene Brennan & wife Mary Horgan m Feb 4 1894 Listowel
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1894/10557/5845846.pdf
​www.census.nationalarchives.ie/pages/1901/Kerry/Urlee/Lacka__East/1419984/

Laharan, Valentia
John Brennan & his wife Kate O'Connor as per bapt of son John Dec 22nd 1876 Valentia
www.census.nationalarchives.ie/pages/1901/Kerry/Valentia/Laharan/1407136/

Laherdane, Kilehenny
​Eugene & wife Catherine Connor, as per Birth Cert of son Edmond 28 July 1886
www.census.nationalarchives.ie/pages/1901/Kerry/Killehenny/Lahardane/1419849/
 civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1886/02586/1955998.pdf


Main St., Caher
Charles Brennan & wife Bridget
www.census.nationalarchives.ie/pages/1901/Kerry/Caher/Main_Street/1403674/

Mastergeehy, Cloon
John Brennan & wife Ellia
www.census.nationalarchives.ie/pages/1901/Kerry/Cloon/Mastergeehy/1405752/

Maulagallane, Sneem
James Brennan, widower
​www.census.nationalarchives.ie/pages/1901/Kerry/Sneem/Maulagallane/1411853/
Daniel Brennan son of James m Bridget Hussey 1896
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1896/10484/5818415.pdf

Moybella North, Ballyconry
Catherine Brennan, single
www.census.nationalarchives.ie/pages/1901/Kerry/Ballyconry/Moybella_North/1419436/

Newmarket St., Caher
Charles Brennan & wife Ellin Golden
​www.census.nationalarchives.ie/pages/1901/Kerry/Caher/Newmarket_Street/1403711/

Ownagarry, Kilgobnet
Peter Brennan & his wife Mary
www.census.nationalarchives.ie/pages/1901/Kerry/Kilgobnet/Ownagarry/1416519/
​Marriage of son Peter to Bridget Tuohy Feb 9 1929 Killorglin
​civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1929/09058/5277125.pdf

Pound Lane, Kenmare
Hannah Brennan, widow and son Daniel
www.census.nationalarchives.ie/pages/1901/Kerry/Kenmare/Pound_Lane/1410618/
​Daniel Brennan m Hannah Cody of Waterford c1905, as per birth cert of son Patrick Mar 25 1910 Kenmare
​civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1910/01565/1631737.pdf

Julia Brennan, widow
www.census.nationalarchives.ie/pages/1901/Kerry/Kenmare/Pound_Lane/1410615/ 

Rathkieran, St. Finans
John Brennan & his wife Mary Sullivan, mother in law Nora Sullivan resident with couple
www.census.nationalarchives.ie/pages/1901/Kerry/St__Finans/Rathkieran/1405824/
​
Rea, Abbeydorney
John Brennan & wife Ellen Buckley m Feb 10th 1891Abbeydorney
www.census.nationalarchives.ie/pages/1901/Kerry/Abbeydorney/Rea/1425068/
churchrecords.irishgenealogy.ie/churchrecords/details/cd87940507351

Rossdohan, Tahilla
Phillip Brennan Retired Army Pensioner & wife Annie (poss Mountain as per bapt of dau Ellen Aug 21st 1892 Sneem)
www.census.nationalarchives.ie/pages/1901/Kerry/Tahilla/Rossdohan/1412053/ 

Rusheen, Carrig
Paul & his wife Anne Lynch as per bapt of son Thomas  April19 1896
www.census.nationalarchives.ie/pages/1901/Kerry/Carrig/Rusheen/1422096/

Roe St., (Rae St.) Tralee Urban
www.census.nationalarchives.ie/pages/1901/Kerry/Tralee_Urban/Roe_Street/1432060/
Mary Brennan, widow

Rock St., Tralee Urban
John Brennan & wife Margaret O'Connor m Nov 20th 1894 Tralee
www.census.nationalarchives.ie/pages/1901/Kerry/Tralee_Urban/Rock_Street/1432203/
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1894/10583/5855825.pdf

Rosacoosane, Greenane
Daniel Brennan, widower
son Michael Brennan, wife Margaret Healy as per birth cert of dau Bridget Aug  1st 1897
​civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1897/02100/1800267.pdf
www.census.nationalarchives.ie/pages/1901/Kerry/Greenane/Rossacoosane/1410267/

Sneem Upper, Sneem
Michael Brennan, widower
www.census.nationalarchives.ie/pages/1901/Kerry/Sneem/Sneem_Upper/1411940/
Phillip Brennan & wife Mary Teahan as per bapt cert of son Daniel April 26th 1887
www.census.nationalarchives.ie/pages/1901/Kerry/Sneem/Sneem_Upper/1411931/

Strand Street, Tralee Urban
James Brennan (Constable RIC) & his wife Kate Donovan as per birth of Mary Elizabeth Dec 13th 1897 Tralee
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1898/02090/1797083.pdf

Tahilla, Tahilla
Patrick Brennan & wife Julia Mulcahy m May 7 1895 Sneem
​Name PATRICK BRENNAN JULIA MULCAHY
Address TAHILLA TAHILLA
Occupation NRNR
Father JOHN BRENNAN PATRICK NEILL
www.census.nationalarchives.ie/pages/1901/Kerry/Tahilla/Tahilla/1412088/
​
Toohana, Balyconry
Michael Brennan & wife Kate
son Denis Brennan & wife Mary Fitzgerald as per bapt of son Phillip July 10 1900
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1900/01979/1762854.pdf 
www.census.nationalarchives.ie/pages/1901/Kerry/Ballyconry/Toohana/1419379/

Toorrreennasliggaun, Caragh
Michael & his wife Julia (poss Corkery as per bapt cert Oct 21 1888)
www.census.nationalarchives.ie/pages/1901/Kerry/Caragh/Tooreennasliggaun/1416011/

Top St., Caher
Charles Brennan & wife Margaret Donnelly m Mar 22nd 1892
Name CHARLES BRENNAN MARGARET DONNELLY
Address CAHIRCIVEEN CAHIRCIVEEN
Fathe rDANIEL BRENNAN DENIS DONNELLY
www.census.nationalarchives.ie/pages/1901/Kerry/Caher/Top_Street/1403840/

Tullig, Castleisland
Hanoria Brennan, single 
www.census.nationalarchives.ie/pages/1901/Kerry/Castleisland/Tullig/1427848/

I recently discovered a genetic cousin via Autosomal DNA testing whose Irish roots are in the name Gahan. My genetic cousin could be related to me on my maternal side but since we have to start somewhere I did a search of Brennan/Gahan marriages 1790-1863 on rootsireland.ie. (Civil Registration began in Ireland for Roman Catholics in 1864)
1790 Sept 19 Mooncoin Kilkenny John Gahan of Farrensarron Margaret Brennan of Farrensarron Wit. William Henebry & Richard Walsh & Thomas Dunphy
1792 Dec 11 Haggardstown, Co. Louth Thomas Brennan of Dundalk Ann McGahan of Priorlands Wit. Francis Richards & Jas Donely
1803 Jan 20 Killaveney, Co. Wicklow William Gahan Hester Brennan Wit. Francis Morton & John Gahan & Andrew Brennan
1824 Mar 2 Kilronan, Co. Roscommon James Guiheen Mary Brennan Wit. Thomas Guiheen & Celia Brennan
Note; since Celia is an uncommon name I searched for a Celia Brennan born in Kilronan. Found Celia born to Michael Brennan (could he be Mary Brennan's brother??) & Margaret Cooper 1840 Dec 28 ~~also Sara b 1835, Guy b 1837, Margaret b1847
1825 Feb 12 St. Canice's Co. Kilkenny Patrick Brennan Mary Gahan Wit. Nicholas Brennan & Nancy Ryan
1826 Nov 1 Clara, Co. Offaly Michael Brennan Jane Gahan
1834 Jan 23 Paulstown, Kilkenny James Brennan of Bornafea  Elizabeth Gahan of Bornafea Wit. Martin Brennan & John Gahan
1836 Nov 1 Paulstown, Kilkenny James Brennan of Goresbridge Margaret Gahan of Goresbridge Wit. Lawrence Murphy & Anastasia Bowe
1840 Mar 3 Enniscorthy, Co. Wexford Nicholas Gahan Margaret Brennan Wit. James Stapleton & Mary Leary
1848 Sept 11 Portarlington, Co. Laois Michael Brennan Bridget Gahan Wit. George & Eliza McDonald
1851 May 3 Ballymena, Co. Antrim Joseph Brennan Catherine McGahan Wit. Elizabeth Diamond & Anne Cronan
1863 Feb 17 St. Mullins, Co. Carlow Michael Brennan Anne Gahan Wit. Andrew Hickey & Elizabeth Doyle

If you have Brennan Gahan in your family tree I would be most grateful for further information particularly if your Gahan family have Tipperary roots.
You are welcome to share this research with others but please acknowledge the source of the research. by linking it back to this blog post.
Further information re Kilronan, Co. Roscommon
www.kilronanparish.ie/

On Dec. 9th 1864 Prior Brannan of Company A, 70th, US Colored Troops married Arrinda Adams of Thomas County, Georgia, in Natchez, Mississippi.
Prior was aged 28, born c 1836 and Arrinda aged 24, born c1840. Prior was described in his marriage certificate as Black, son of a Black mother and a Black father.  Arrinda was described as half White, her mother as three quarters White and her father as a quarter White.
Their witnesses were N S Hitchcock, Co. A, 70th, US Colored Troops &  Phineas Mixer, Ordained Minister.
I found the following brief record but cannot ascertain if it belongs to the same man. 
Mixer, Jr. , Phineas
​BATTLE UNIT NAME:
33rd Regiment, Indiana Infantry
SIDE:
Union
COMPANY:
SOLDIER'S RANK IN:
Private
SOLDIER'S RANK OUT:
Private
ALTERNATE NAME:
FILM NUMBER:
M540 ROLL 52
PLAQUE NUMBER:
NOTES:
none

I have also found Prior Brannan with another spelling of his name
Pryor Branun
United States Civil War Service Records of Union Colored Troops
NamePryor Branun
Event TypeMilitary Service
Event Year1864
Age (Original)27
Military Unit Note71st US Colored Infantry

 After stenuous efforts I have been unable to find Prior & Arrinda after their marriage so I would be grateful if anyone can add to their life story and honour his service. Thank you.

Sources
US Freedman's Bureau Marriages 
familysearch.org/ark:/61903/1:1:F161-3JP
​US Civil War Record of Union Colored Troops
​​familysearch.org/ark:/61903/1:1:JZKN-QYV
​National Park Service
www.nps.gov/civilwar/index.htm
​

 John Branon born c1830 Georgia, Race Mulatto 
wife Louisa Brannon born c1835, Race Black
Children
John born c1855
Isaac born c1858
Amilia born c1860
Mary born c1862
Elizabeth born c1865


Sources
John Brannon, Screven, Georgia 1870
familysearch.org/ark:/61903/3:1:S3HY-XXZQ-LHC?mode=g&i=175&cc=1438024

This list includes variants of the surname 
Nora, born Ireland c1842, husband? Thomas born Ireland c1839, son William born c1868 Georgia. Also resident in the household William O'Brien born Ireland c1804.  Resident Augusta Ward 4, Richmond, Georgia

Cathr, born Ireland  c1825, husband? James born Ireland c1820, children? James born c1862 & Mary Ellen born c1868, both in Georgia
Also resident in the household Peter Garrity & Jas Cullen born Ireland c1821 & c1822. Resident Savannah, Chatham, Georgia 1870 

Esther, born c1836 Ireland, husband? John born Ireland c1832, children? John born c 1859 George born c1861 Cranford born c1864, all born Ireland Patsey born Georgia c1868. Resident Savannah, Chatham, Georgia 1870
 
Mary born c1830 Ireland, children? Bridget born Georgia c1850, Johanna born Georgia c1856. Also resident in the household Michael Tully & William Morris, born c1845 & c1844 respectively, both born in Ireland. Resident 1870 Savannah, Chatham, Georgia

Mary born Ireland c1825, husband Thos born Ireland c1823, sons Thos born c1867 Georgia, James born c1869 Georgia. resident 1870 Savannah, Chatham, Georgia

Bridget born Ireland c1838, husband? Michael born Ireland c1835. Also resident in the household Patrick Hall & William Marvin born c1847 Ireland & c1834 Georgia respectively. Resident 1870 Savannah, Division 21, Chatham, Georgia
​
Mary born c1840 Ireland. With Jessie Lee born c1848 New York. Resident Savannah, Chatham, Georgia

Source 1870 US Federal Census
Nora Brannon
familysearch.org/ark:/61903/3:1:S3HT-DCR3-8JY?mode=g&i=88&cc=1438024
Cathr Brennan 
familysearch.org/ark:/61903/3:1:S3HT-DRWS-7TY?mode=g&i=223&cc=1438024
​Esther Brannan
​familysearch.org/ark:/61903/3:1:S3HT-DRWS-7FJ?mode=g&i=237&cc=1438024
​Mary Brannan
familysearch.org/ark:/61903/3:1:S3HT-DRWS-75P?mode=g&i=630&cc=1438024 
Mary Brennan
 familysearch.org/ark:/61903/3:1:S3HT-DRWS-7F7?mode=g&i=410&cc=1438024
​Bridget Brennan
​ familysearch.org/ark:/61903/3:1:S3HT-DRWS-75P?mode=g&i=630&cc=1438024

Gaylord V Brennan was born in Illinois in 1922. He was the son of Louis G & Edna A Brennan. In 1930, the family were living in Rockford, Winnebago, Illinois. Both Louis George and Edna were born in Illinois. By 1940 Edna was widowed and she and Gaylord were lodging in the home of Herbert and Ada Cook in North Court Street, Rockford. 
A Draft Registration Card for George Louis Brennan 1918 suggests that Louis/George  used both his first names interchangeably at different times in his life. His wife is named Edna and he is recorded as self-employed with a peanut vending machine business. George is recorded as 5 foot 10 & one eight inches tall, of stout build with blue eyes and sandy hair.
Louis died on July 29, 1935 according to a transcription of the Illinois, Deaths and Stillbirths Index 1916-1947. This record also tells us that Louis was born on Feb. 22 1880 in Shirland, Illinois. He was only 55 years at the time of his death.
This record of Louis' place of birth gives us a great clue for checking the 1880 US Federal Census, if he was born prior to the census. Imagine my delight when I found Louie aged 3 months living with his parents Martn & Marccella Brennan. Martin was born in Wisconsin and Marcella in New York. All 4 of their parents were born in Ireland!
​The transcription of the Illinois, Deaths and Stillbirths Index 1916-1947 came to my aid again giving me the death of Martin C Brennan (birthplace Footville, Wisconsin) on March 21 1933 in Rockford, Winnebago. Husband of Marsella. Martin's father was John Brennan and his mother Mary Cannon, both of whom were born in Ireland. Obituary & Gravestone for John Brennan www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=124285539

Sources
1930 US Federal Census familysearch.org/ark:/61903/1:1:X39C-HBL
​1940 US Federal Census 
1918 Draft Registration Card familysearch.org/ark:/61903/1:1:K6D1-K6V
1880 US Federal Census familysearch.org/ark:/61903/1:1:MX23-Y99
1933 Death Record familysearch.org/ark:/61903/1:1:N3L9-8WL​

​Special thanks to Paul Howes of www.howesfamilies.com who supplied me with this picture from Memorial Park on Old Moultrie Road in St Augustine, Florida and instigated this research.
​
​

Sources
Pilot Officer Ian Eric (“Doggie”[1]) BrennanPilot Officer Ian Eric Brennan of 3 Squadron RAF Volunteer Reserve was tragically killed whilst conducting dog fight training in his Hawker Hurricane on 1st March 1941. He was aged 22 years and 9 months when he was in collision with the Hurricane of Sgt Joyce.
P/O Ian Eric Brennan flying Hurricane V7069 was the senior pilot that day, and Sgt Joyce in P3255 was the pupil hoping to gain some fighter tactic experience.  Out off the Sumburgh Head a number of maneuvers had been carried out and all seem to go OK when suddenly the two aircraft collided and unable to recover P/O Brennan’s Hurricane plunged into the sea. The other Hurricane, severely damaged and with its pilot Sgt Joyce badly shaken up managed to limp back to Sumburgh where he got down safely, alas his instructor P/O Brennan, aged 22 from Farnborough, Kent, was killed and his body never recovered[2].
His plane was recorded as crashing here: 59.916739, -1.166665[3]
​
​[2] http://www.crashsiteorkney.com/shetland-underwater-sites
[3] https://canmore.org.uk/site/289470/hawker-hurricane-i-sumburgh
[4] London Gazette: https://www.thegazette.co.uk/London/issue/35019/page/7128/data.pdf Issue 35019 Page 7128 20 December 1940: “16th Nov. 1940. (Seniority 5th Nov. 1940) 901413 Ian Eric Brennan (88229)
[5] BRENNAN Ian Eric of Mount Bank Farnborough Kent died on or since 1 March 1941 on war service Administration Llandudno 18 October [1941] to Alfred Eric Brennan works manager. Effects £447 18s 2d. http://interactive.ancestry.com/1904/31874_222436-00584?pid=2281234&backurl=http://search.ancestry.com//cgi-bin/sse.dll?_phsrc%3DGmI26%26_phstart%3DsuccessSource%26usePUBJs%3Dtrue%26gss%3Dangs-g%26new%3D1%26rank%3D1%26msT%3D1%26gsfn%3Dian%2520eric%26gsfn_x%3D0%26gsln%3Dbrennan%26gsln_x%3D0%26MSAV%3D1%26cpxt%3D1%26cp%3D11%26catbucket%3Dr%26uidh%3D5h3%26pcat%3DROOT_CATEGORY%26h%3D2281234%26db%3DUKProbateCal%26indiv%3D1%26ml_rpos%3D2&treeid=&personid=&hintid=&usePUB=true&_phsrc=GmI26&_phstart=successSource&usePUBJs=true
[6] Commonwealth War Graves Commission (CWGC) http://www.cwgc.org/find-war-dead/casualty/1530381/BRENNAN,%20IAN%20ERIC#carousel2 BRENNAN, Pilot Offr. IAN ERIC, 88229, RAF (VR) 3 Sqdn. 1st March, 1941, Age 22. Son of Alfred Eric and Jean Brennan, of Farnborough, Kent. Panel 31

The 1911 Census gives us a wonderful picture of my Gilleran great and great great grandparents.
My great grandparents, Michael Gilleran and Ellen Beirne and their five children were living with Michael's parents, John Gilleran and Anne Fox. 
John Gilleran of Roadwalk and Anne Fox of Clooncraff (age 18)  married in Roscommon RC Church in 1872. The Civil registration record gives only their fathers' names but the Church marriage record transcription (rootsireland) records the following;
Parents of John Gilleran, Patrick Gilleran and Mary Hanly
Parents of Anne Fox, Michael Fox and Margaret Brennan .
John Gilleran was baptised on Feb. 28 1845. His godparents were James Hambrogue and Margaret Brennan. (rootsireland) I have found baptisms for 6 siblings,
Thomas 1833
Patrick 1835
Margaret 1837
James 1840
Michael 1842
William 1847
John Gilleran died in 1920, in the company of his daughter-in-law Ellen.

The 1911 Census gives Anne Fox Gilleran as the mother of 4 children. Baptism record transcripts give us;
Mary Ann born 1873
Michael born 1874
Mary Ann born 1875
Patrick born 1877.
Anne died in 1925 of old age (75 acc. to the Death Record) in the company of her daughter-in-law Ellen.

Ellen Beirne Gilleran was the daughter of Malachy Beirne of Ballyglass, Rahara, Co. Roscommon & Ann Donnelly.
In 1857, Griffith's Valuation records Malachi Byrne as a tenant of Robert H Gunning in Ballyglass, Rahara.
Malachy Byrne married Ann Donnelly in 1854 in Knockcroghery.
Patrick 1855
Brigid 1864
Martin 1867
Timothy 1870 
Ellen & Margaret her twin were born in 1873.

Sources
rootsireland Baptism and Marriage records
Civil Registration Records BMD
www.census.nationalarchives.ie/pages/1911/Roscommon/Mote/Clooncraff/783297/