Information on ancestor

Hi there. My maiden name is Delaney and I'm 4th generation Irish decent. Looking for more details on my GG grandfather, Morris Delan(e)y.He was born in Ireland and immigrated to Ontario, Canada as a young man. I found a Catholic Parish register baptismal record dated June 10, 1821, Rathfarnham. His parents I think are Patt Delany and Margaret Fitzpatrick. I'm not sure where exactly Morris was born & raised or where his parents were from in Ireland. I found a marriage registered for Patt Delany and Mary Fitzpatrick for Aug 31,1821 from Ballinakill (Cullina)Galway. So were they from that area? Why would their son be baptized in Rathfarham?I wonder where they are buried? Morris might have gone to the US initially before settling in Renfrew County, Ontario but I have no information on when/how he came. Once in Ontario, he married an Irish woman named Julia McGrath(1815-1880) in 1849 and they had a son, Michael(1850-1933) but she might have been a widow with the last name Navin or Nevin. I found census records from 1851 Grattan, Renfrew, Ontario listing Morris and Julia as age 30, then 4 children with last name Nevin(Catherine, John, Julia and Johanna). There is no son Michael listed which makes me think he came after?Also the name Patrick Nevin (1815-1849) shows up as her husband sometimes. The 1861 & 1871 Renfrew, Ontario census doesn't show Morris Delaney living with his wife or children. I wonder where he went and where he died? Sorry this was so long. Any more information you could provide would be very welcome. Thank you! I visited Ireland for the first time Aug/19 and was so happy to be there! Colleen (Delaney) Hulme, Toronto, Ont, Cda.