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
Fitzpatrick (surname) Fitzpatrick (surname) The surname Fitzpatrick is the known translation of at least two different surnames: Mac Giolla Phádraig and Ó Maol Phádraig from the original Irish to English. Currently, it is ranked as the 60th most common surname in Ireland with an estimated 12,700 individuals bearing the name. While both "Mac Giolla Phádraig" and "Ó Maol Phádraig" have similar meanings, they are likely unrelated; yet both have arrived in the modern era as "Fitzpatrick". Despite the prefix ""Fitz-"", Fitzpatrick is not a name of Hiberno-Norman descent. Giolla Phádraig (means "the devotee of Patrick"). Gilla Patráic mac Donnchada was a tenth