Hi Anne,
I just came across this thread again and was not sure how far we managed to pursue this (due to health issues, I sometimes have to drop the research).
One thing to note is that the names are different on every record.
You mention two daughters.
However, I have found, Bridget, baptised 5/1/1851, daughter of Luke Kerige and Bridget Kerige (with a note that the family name, might be Kerrigan).
then, Catherine, baptised 29/5/1853, daughter of Mark Kerrigan and Mary Walsh.
then, Mary, baptised 4/6/1855, daughter of Mark Kerigan and Mary Walsh.
then, Mark, baptised 7/9/1856, son of Mark Comer and Mary Welsh.
then Patrick, baptised 15/3/1857, son of Hugo Comer and Maria McDonnough.
then Bridget, baptised 23/1/1859, daughter of Luke Comer and Mary McDonough.
This seems likely to be more than one family, due to the proximity of some of the baptisms, but you would need to look at the complete records to check the dates of birth.
Do you have names for the daughters that you are sure belong to this family?