Henry Carr born c1857 Williamstown Galway. Father Thomas Carr

I am trying to find the birth/baptism for Henry Carr born c1857.  He married an Ann Quinn in Lancashire England  28 July 1878. On the marriage certificate he gives his father as a Thomas Carr a Labourer.  I have them on the 1881, 1891, 1901, 1911 & 1921 census.  In 1911 & 1921 he gives his place of birth as Williamstown Galway.  I have searched Roots Ireland to no avail.  Has anyone got thoughts about this please.

Many thanks

Graham