Thomas' parents James Brennan, son of Owen and Bridget Kilmurry, daughter of Marcus married on 17 Apr 1877.
Marriage 1877
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1877/11136/8077976.pdf
1901 Census
www.census.nationalarchives.ie/pages/1901/Roscommon/Dunamon/Slieve_and_Corbally/1667514/
1911 Census
www.census.nationalarchives.ie/pages/1911/Roscommon/Dunamon/Slieve_and_Corbally/766640/
Commonwealth War Graves Commission
https://nrm.knackhq.com/ww1-railway-workers#railway-workers-public/fallenrailwayworkersfromthefirstworldwardetails/56339bbbb31640051cea0c62/