Gilmore (surname) lad". Gilmore (surname) Gilmore and Gillmore are surnames with several origins and meanings. The name can be of Irish (from Ulster) and Scottish Highland origin, Anglicised from the Gaelic "Mac Gille Mhoire" (Scottish Gaelic), "Mac Giolla Mhuire" (Ulster Irish Gaelic). The name was a patronymic name meaning "servant of (the Virgin) Mary". Another origin of the surname Gilmore is Irish, with two separate meanings. In County Armagh, the name is an Anglicised form of "Mac Giolla Mhura" "servant of St. Mura" (of Fahan, County Donegal). In County Sligo, "Gilmore" is an Anglicisation of "Mac Giolla Mhir" meaning "son of the
Mac Aodhagáin Flann Mac Aodhagáin up to the year 1643. The surname has been Anglicised in a variety of ways, including as Mac Egan, Egan, Eagan, Keegan, or Keigan, McKiegan, and McKagan. Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Muirchertach Mac Aodhagáin Mac Aodhagáin Mac Aodhagáin (English: Egan or Keegan), is an Irish Gaelic clan of Brehons who were hereditary lawyers - firstly to the Ó Conchobhair Kings of Connacht, and later to the Burkes of Clanricarde. The earliest surviving Irish law manuscript, "In Senchas Már", was written prior to 1350