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
Leavy surname Leavy may appear prefixed with the Gaelic language "Mac" or even "Mc", "MacA" and "MacE". Notable people with the surname include: Leavy Leavy (Lay-Vee) is a Scottish surname. It arose from the Scots slurring of the surname of the Irish MacDunleavy (dynasty) (Gaelic language MacDuinnshléibhe) royals, exiled in the still Celts Highlands of Scotland after the 12th century English conquest of the last remnants of the Dunleavy’s, thereto, though reduced, still sovereign Irish state in southeastern Ulster, that is the (Ulaidh (province). The Dunleavy/MacNulty (Gaelic language Mac an Ultaigh, for an individual of the Ulaidh tribe) were the last