HI
I have little information.
I have a Cecelia/Cecily Mccommiskey b. 1794 Ireland m 8 May 1815 St Annes PArish Liverpool to a patrick McDonough b Ireland c1791. Cecelia died 12 Jun 1879 in Workhouse Hospital, Tranmere, Cheshire
Cecily was sponsor to children of Nicholas and Mary Brady, James and Ann Tallon (found a marriage for an Ann MCcomiskey to James Tallon - probably a sister) - Mary Brady sponsored their children Daniel and Christopher. There must be a connection to Mary Brady I suspect she is born either McDonough or McCommiskey.
Found the marriage record and she is also listed as Mccomiskey on daughter Ann's birth record as well (she also had daughters Annie Mae, MAry and Catherine and Elizabeth) Her sons were Roger, Christopher, Daniel and Peter and Patrick