Xavtia,
Don't know if its the same person as yours, but I have a Martin Callaghan who was a sponsor at the Knock baptism of Bernard Joseph Kearns on 20 Dec 1882 (Kearns and Callaghan are both in my tree).
Also, FYI, according to the Knock records of baptisms there are the following others:
Sarah Callaghan for Bernard Kearns on 14 Oct 1874
Thomas Callaghan for James Kearns on 23 Jul 1875
Bernard, James and Bernard Joseph were all siblings and the children of Bryan Kearns and Mary Callaghan of Knock. My family stories say Mary (and her sister Margaret) were from the area of Lakehill, Knock, Mayo but that Mary was born in Cork. Unfortunately I do not yet know the names of Mary & Margaret's Callaghan parents.
Joe
Hi
could anyone point me in the direction of where to look for my great grandad Thomas Callaghan's birth, he was born in Uggool Village c1872 his father MArtin Callaghan was a farmer but had died by the time Thomas was married in 1898 in Haslingden,Lancashire. I believe he also had a younger brother named Anthony but that's as far as i can get 
thanks
