Dalton / Kerwan connection dating to 1809 and earlier

My gggf Luke Dalton, b circa 1810, lived on Coumaraglin Mountain with my gggm Anna (Qualey) Dalton, on a 4-acre plot owned by her father, John Qualey. Luke had a brother, my great-great-great uncle, James Dalton (1809-1849). After James died, Luke put up a headstone for him in the cemetery of the Kilgobnet parish church (St. Abigail's). I have a photo of it.
 

Until last week, I had never been able to track down who were the parents of Luke and James, though I have tried mightily for years. Last week, I found a Ballylaneen/Stradbally parish baptism record online for a James Dalton, showing a baptism date of August 26, 1809. That is the same year of birth as stated on the gravestone of my ggguncle James Dalton, who is buried only a few miles away from Ballylaneen/Stradbally in the Kilgobnet parish cemetery. The baptism record lists the parents as John Dalton and Mary (Kerwin) Dalton. (Note: The handwriting seems to possibly show "Kerwin" spelled with an "i", but I subsequently have found a number of other records online (Griffiths Valuation, gravestone logs) showing that there were a number of "Kerwan"s living in the Ballylaneen/Stradbally area, but no "Kirwin"s.) Perhaps some Kerwan descendants still live in the area.

There were a number of Daltons over in the nearby Kilgobnet/Colligan parishes, only a few miles away. My DNA testing results and records research have confirmed my Dalton ancestry origins to those specific locations. However, I would like to try to track down more information about a possible Dalton connection to Ballylaneen/Stradbally parish. Only one Dalton is listed there in Griffiths Valuation, a Thomas Dalton. I would like to find more information on John Dalton, husband of Mary (Kerwan) Dalton. The couple would have been born in roughly the 1790 time frame, given the 1809 birth year of James. It's possible her Kerwan family was from Ballylaneen/Stradbally but John Dalton (and his family) was from the nearby Kilgobnet/Colligan area. I am looking for clues that will help me find more about either of them, and perhaps even confirm they were my ggggparents.

Bill Dalton, Virginia Beach, VA (USA)

UPDATE:  Uggh!  Someone hacked this message thread and added the ugly response shown below with my name on it, dated "Saturday 24th March 2018, 04:21PM". Please disregard the offensive post. Hopefully, a moderator will see it and can remove it. It won't let me do so.