Gahan (surname) Irish language "Mac Gaoithín", meaning "son of "Gaoithín"", although the more common Anglicised form of this Gaelic name is "McGeehan" in Ulster. Gahan (surname) Gahan (and its variant Gahame) is a surname with several different origins. One origin of the surname is from a reduced form of "McGahan", which is in turn an Anglicised form of the Irish language "Mac Eacháin", meaning "son of "Eachán"". Another origin of the name, in Leinster, is from a reduced form of the Irish language "Ó Gaoithin", meaning "descendant of "Gaoithín"". The personal name "Gaoithín" is a diminutive of "gaoth", meaning "wise", or "wind".
Donnelly (surname) Donnelly (surname) Donnelly is an Irish surname. It is the Anglicized form of the Gaelic "Ó Donnghaile", "Ó" meaning male descendant of ("Ní" is the female equivalent), and Donnghaile (or Donnghal), a personal name composed of the elements "donn" (brown), plus "gal" (valour). The name O’Donnelly is derived from the descendants of Donnghaile (Donnghal) (an individual who lived during 10th century in Ireland) who was the great grandson of Domhnall, King of Aileach. Early ancestors of this surname were a part of Cenél nEoghain and the Uí Néill as descendants from the line of Eógan mac Néill one of the