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Biography
Infobox surname 2| name = Costello| pronunciation =| gender = Unisex| language = English language|English | languageorigin = Irish language|Irish | origin = Mac Oisdealbhaigh| meaning = "son of Oisdealbhach "| seealso = Mac Coisteala| cognate = Mac Oisdealbh| family = Costello is a surname in the English language .
The surname has been borne by a notable Irish clan|Irish family who claimed descent from Jocelyn de Angulo ( floruit|fl. 1172), an Anglo-Norman knight . The family first appears on record in Ireland in 1193, when the Annals of the Four Masters state: Inis Clothrann do orgain la macaibh Oisdealb, & la macaibh Conchobhair Maonmaighe. Inishcloghbran was plundered by the sons of Osdealv, and the sons of Conchobar Maenmaige Ua Conchobair|Conor Moinmoy . http://www.ucc.ie/celt/published/T100005C/ Oistealb or Osdealv was the Gaelic rendering of Jocelyn http://www.irishtimes.com/ancestor/surname/index.cfm? fuseaction=History& Surname=costello& UserID=; the sons of Joycelyn were Philip, Gilbert, and William de Angulo . The descendants of William de Angulo/Mac Costello settled in Connacht and became Gaelicized, dropping the surname de Angulo in favor of Mac Oisdealb , or Mac Costello http://www.irishtimes.com/ancestor/surname/index.cfm? fuseaction=History& Surname=costello& UserID=. The barony of Costello in east County Mayo|Mayo is named from this family.
The name Costello has a false etymology|superficially Italian language|Italian appearance to it, though it is not actually of Italian origin. However, it has occasionally been adopted as a pseudonym or stage name by famous people of Italian descent, including Al Costello (né Giacomo Costa), Frank Costello (né Francesco Castiglia) and Lou Costello (né Louis Francis Cristillo).
People with the surname
Al Costello , the ring name of Italian-Australian professional wrestler Giacomo Costa
Barry M. Costello , United States Navy Vice Admiral
Billy Costello , American boxer
Carol Costello , CNN news reporter
Daniel Rae Costello , Pacific musician
Dolores Costello , American film actress
Dubhaltach Caoch Mac Coisdealbhaigh , Irish soldier and rapparee (died 1667)
Elvis Costello , British singer/musician (real name Declan Patrick MacManus)
Frank Costello , American criminal/mobster (born in Italy as Francesco Castiglia; took the Costello name in the 1920s)
Helene Costello , American film actress, from whom Lou Costello (see below) took his stage name
Jerry Costello , American politician
Joe Costello (Irish politician) (born 1945), Irish Labour Party politician
John Costello (disambiguation)
Joseph Costello , American computer scientist
Larry Costello , American professional basketball coach
Lou Costello , Italian-American actor and comedian (born Louis Francis Cristillo), part of Abbott and Costello
Louisa Stuart Costello , British author and poet
Mary Anne Costello, wife of George Canning and mother of George Canning
Mary Costello, mother of John B. Kelly, Sr.|John Kelly , aunt of Paul Costello , grandmother of Grace Kelly and great-grandmother of Albert II, Prince of Monaco
Matthew J. Costello , author
Maurice Costello , American stage and screen actor
