I think it might, in the long run, anyway. I would like to see how well all of the Westmeath and Offly Lynam's link together. I plopped down £20 at the Dun Na Si Heritage Center while visiting Moate, and hope to have some info from them by October (they claim to be very backed up). I picked up a few names from Killucan Parish microfilm at the National Library in Dublin. Nothing that links directly to my G-G-Grandfather, but I hope that it might someday.
My G-Grandfather, Barney, had a younger brother, John (born in Ohio), who COULD have been named for a Grandfather John, but 1855 is too young for that.
And I snapped a picture of a tombstone in Horseleap (near Moate) of a John Lynam, who died August 5th, 1904 aged 86 years. That would yield an approximate birth year of 1818, possibly YOUR G-Grandfather's father? (Of course there are probably MANY John Lynams.) I guess the best way to solve a puzzle is to consider any pieces that might come up.