Costello (surname) to a Gaelic translation of Jocelyn, Jocelyn d'Angulo's given name. In fact, MacOisdealbhaigh is the Gaelic translation of his brother Hostilo (or Hostilio) d'Angulo's first name. Oisdealbh is a much more obvious translation of Hostilo. It is Hostilo's descendants who would bear the surname Mac Oisdealbhaigh (son of Oisdealbh or Hostilo). The surname would later be anglicized to Costello, Costelloe, and Costellow. Gilbert d'Angulo is also sometimes listed as the son of Jocelyn d'Angulo in error. Gilbert d'Angulo is the father of both Jocelyn and Hostilo. It occasionally has been adopted as a pseudonym or stage name by famous people
Cullen (surname) Cullen (surname) Cullen is a surname of Gaelic origin. It is thought to be derived from the pre 8th century Old Gaelic name O' Cuileannain, with the prefix O' indicating a male descendant of, plus the personal byname Cuilleannain. The name seems to be related to Cullinane. While Cullen is encountered primarily in Dublin and southeast Ireland, Cullinan/Cullinane used almost exclusively in western Ireland on a North-South-Axis from Galway to Cork. A distribution map of the name has been processed on a genealogy site. A Cullenite is a follower of any man named Cullen. Notable Cullens to have followers referred