Sorry, I did not notice your reply (too many emails)
I believe that Patrick Garrity 177e6-1853 married Margaret Kelly 1786- June 1830. The gravestone at St. Cornelius gives the dates and that they were both from Monaghan
Just checked to see where I got that Kelly from and frankly, it is not great. I have a John Garrity married to
Rose McMahon in 1842 for that marriage parents are Patrick Garrity & Mary Kelly so perhaps this is the couple, perhaps not.
George Garrity went to Wisconsin and if I am right that Catherine Garrity Richards is a sister, we find her in the 1870 census with Owen, in his home.