For background on how the map was made (and its flaws), see the relevant blog entry.
| Mac Coscair | Mac Cusker, Cosgrave, Cosgrove : féach Mac Oscair. |
| Mac Oscair | Mac Cusker, Cosgrave: líonmhar: Fear Manach-Tír Eoghain & rl. Craobh de Mhag Uidhir Fhear Manach. Bhí an t-ainm Oscar (fia-chara) coitinn. |
| MacCosker | rare: Strabane (Tyrone). See Mac Cusker. |
| MacCusker | numerous: Fermanagh, Tyrone and Ulster generally. Ir. Mac Oscair, from first name Oscar, dear-lover, popular amongst the Maguires of Fermanagh to whom this sept were related. GPN, SI. |
DEDs where Cosker and a second surname are found together
This list shows total 1901 Cosker households by county.
Click on the county to see detail.
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