« Reply #2 on: Friday 19 May 17 22:39 BST (UK) »
The two most likely (i.e. closest) parishes are St. Agatha's, North William Street, Dublin 1 and St. Laurence O'Toole's, Seville place, Dublin 1.
Records from both of them are online at
http://www.nli.ie but only go as far as 1881. Both parishes are still in operation.
A nice letter with a small donation to both churches might elicit a photocopy of the records.
Coffey, Cummins [Rathfalla, Tipperary], Cummins [Skirke, Laois], Curran, Dillon [Clare], Fogarty [Garran, Laois/Tipp], Hughes, Keshan (Keeshan), Loughman [Harristown and Killadooley, Laois], Mallon [Armagh], Malone, Markham [Caherkine, Clare], McKeon(e) [Sligo/Kilkenny/Waterford], McNamara, Meagher, Prescott [Kilkenny/Waterford/Wexford?], Rafferty, Ryan, Sullivan, Tobin
GEDMatch: T665306 tested with Family Tree DNA and also with ancestry
GEDCOM file: 1980344