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.|