Mac Cumascaigh
Mac CUMASCAIGH—IV—MacCumisky, MacCumesky, MacComiskey, Cumisky, Cumesky, Cumiskey, Comesky, Comiskey, Commiskey, Cumisk, (Comerford, Cummerford), &c.; 'son of Cumascach' (confuser). This surname is almost peculiar to Cavan, Westmeath and Longford.
Alphabetical Index to Irish Surnames