Mac Gillycuddy - Irish / Mheic Ghiolla Mochuda - Chuda (Descended from a son of the devotee of St. Cuddy) Carrthach - the Loving One. A Heberian Eoghanacht Chaisil O Sullivan "Mor" Sept / Family branch who were originally from Co. Kerry in Iar Mhumhain / South Western Munster who founded the Lismore monastery in Co. Waterford in the south - east of Munster. Allen / Ailinn O Sullivan the Bishop of Cloyne in Co. Kerry became the Bishop of Lismore in Co. Waterford and died there in 1253 AD and because he was so dedicated to St. Mochuda / St. Cuddy his kinsmen eventually took the name of Mac Gilli Cuddy. Conor O Sullivan killed Donnell "Mor" O Sullivan of Beare and in 1563 AD because of this fingal / kin slaying his family descendants became known as *Mac Gillycuddy O Sullivan. From then on they used either Mac Gillycuddy or O Sullivan as their surname. Churchtown in Co. Kerry was their burial place situated on the River Laune where there is an old ruined Catholic Church. Ancestors - *85.Eoghan "Mor" (Eoghanachta), *84.Ailill "Oluimm" the 1st King of Munster.

Mac Gilmartin - Irish / Mheic Giolla Mhartain (Descended from a son of a devotee of St. Martin) A Heremonian Ui Cobhthaigh Dal Cuinn "Northern" Ui Niaill Cenel nEogain Cenel Fearadhaigh Mheic Fiachra Sept / Family branch, who had their territory in Co. Fermanagh and nearby at Clogher in Co. Tyrone in Central Southern Ulster. One of their Septs later on went into Co. Leitrim in Northern Connacht where they became known as Kilmartin. Kinsmen to the Clann Cathmhaoil / Mac Campbell / Mac Campell / Caldwell ./ Mac Cawell. Ancestors - *89.Feradach, *88.Eogan the 1st King of Aileach (Cenel nEogain), *87.Niall of the Nine Hostages the 126th King of Tara / Ireland (Ui Niaill).

Mac Gilmichael. A Sept / Family branch, who had their territory in Co. Monaghan in Southern Ulster where they were Chiefs.

Mac Gilmichill. See - Mac Meel.

Mac Gilmore - Irish / Mheic Giolla Mhuire (Descended from a son of a devotee of Mary) A Sept / Family branch - who had their territory in the Ulster Province who were descended from an O Morna Sept possibly of Murney in Co. Down in the south - east of Ulster.

Mac Gilmore - Irish / Mheic Giolla Mhir - mear / lively. A Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province. See also - Murray.

Mac Gilna or *Mac Gilnagh - Irish / Mheic Giolla na Naomh - Gilnagh (Descended from a son of the servant of the Saints) A Sept / Family branch, who had their territory in *Co. Longford in the north - west of Northern Leinster with many variants including Mac Aneave nearby in Co. Roscommon in the east of the Connacht Province. See - also Mac Elnay and Ford.

Mac Gilpatrick or Mac Gylpatrick - Irish / Mheic Giolla Phadraig. A Sept / Family branch, who had their territory in Co. Laois and nearby in Co. Kilkenny in the west of Southern Leinster where they were Princes. See also Fitz Patrick.

Gilpin. English origins. They were in Co. Armagh in the south - east of Ulster Province and nearby in Co. Cavan in Southern Ulster.

Mac Gilpin - Irish / Mheic Giolla Finn. A Sept / Family branch, who had their territory in Co. Sligo in the north - west of the Connacht Province.

Gilrain. Used a a variant for Gilleran, which see, in Co. Leitrim in Northern Connacht.

Mac Gilrea. Used as a variant for Kilrea, which see. A Sept / Family branch, who had their territory in the Barony of Clonderlaw in Co. Leitrim in Northern Connacht. See also - Gilroy.

Mac Gilroy - Irish / Mheic Giolla Rua - rua - red / Gillereagh. A Sept / Family branch, who had their territory in the Barony of Clonderlaw. They were also in Co. Monaghan in Southern Ulster. Anglicized also as Mac Elroy and Mac Ilroy in the Ulster Province. Ballymacilroy is in Co. Fermanagh in the south - west of Ulster and Kilroy is in the Connacht Province. See also - Gilrea.