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The McOsker/McCusker Surname Project


Historians state that McOsker ? MacCusker ? MacCosker are principally a branch of the MacGuires in County Fermanagh, in Northern Ireland. We believe that we are descended from Oscar Mag Uidhir, the great-grandson of Donn Carragh Mag Uidhir, the 1st Prince of Fermanagh.



Other surnames in Project

MacCoskar, MacCosker, MacOscair, McCusker, McOsker

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