I found this family using the 1911 and 1901 census:
1901, Richmond
Tho, b 1848, a Farmer
Bridget, b 1854
Children were Patrick b 1886, Mary b 1887, Hugh b 1889, Ann b 1891, Tho b 1892, John J. b1893, Mich b 1895, Bridget b 1897.
1911:
Tho b 1845, DEAF, wife Bridget b 1855. Married 26 years, had 9 children but only 8 living.
Children were: Hugh b 1888, Tho b 1892, John b 1894, Mich b 1896, Bridget b 1899, Kate b 1902.
I have only one entry for a Thomas Gallagher and a Bridget, that is a marriage for Thomas Gallagher and bridget DONEGAN, married 9 March 1884. Unfortunately the church records stop so there are no christenings to this couple. At the time of the marriage the residence was Cloonaragh.
All children listed in both census were single.
Hope that this is your relations!