According to the Irish Civil Registration records Abby Brennan was born on 5 Nov 1904 to father Michael Brennan and mother Margaret Healy at Rosacoosane, Kenmare, Co. Kerry.
Sources
Brennan/Healy Marriage 1895 Kenmare
civilrecords.irishgenealogy.ie/churchrecords/images/marriage_returns/marriages_1895/10521/5832251.pdf
Birth 1904 Kenmare
civilrecords.irishgenealogy.ie/churchrecords/images/birth_returns/births_1905/01789/1702582.pdf
1911 Census
www.census.nationalarchives.ie/pages/1911/Kerry/Greenane/Rossacoosane/283062/