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
Join the McOsker/McCusker surname project
If you want to join the McOsker/McCusker project please order your DNA test here.