[Aird] Mhic Ghiollagáin

Magilligan occupies a peninsula at the mouth of Lough Foyle, derived from the Irish Aird Mhic Ghiollagáin (MacGilligan's Point), where 'aird' denotes a headland or geographical promontory. The MacGilligans were a significant sept descended from Oilioll, son of Eoghan Bredagh, and formed one of the three chief septs under the ruling O'Cahans. Their territory, known as MacGilligan's Country, cons...