Costigan

Costigan (Mac Oistigin) is an Irish surname with higher concentrations in counties Laois, Tipperary and Kilkenny. Costigan is a branch of the Fitzpatricks (Mac Giolla Phádraig dynasty) of Upper Ossory, although the name may also independently derive from Hodgkin, a dimin. of Roger. Genetic evidence shows shared ancestry amongst Fitzpatricks and Costigans with ancestry in Upper Ossory  Notable people with the surname include:


 * Christopher Costigan, explorer of the Jordan River and Dead Sea in 1835
 * Daniel Costigan (1911–1979), Commissioner of the Garda Síochána from 1952 to 1965
 * Edward P. Costigan (1874–1939), US senator from Colorado
 * Francis Costigan, early Indiana architect
 * Frank Costigan, (1931–2009) Australian QC and commissioner in the Royal Commission on the activities of the Federated Ship Painters and Dockers Union (known as the Costigan Commission)
 * Giovanni Costigan (1905–1985), historian
 * George Costigan (born 1947), a British television actor
 * Howard Costigan (1904–1985), American political functionary
 * James Costigan, screenwriter
 * Jason Costigan, Australian Liberal National politician and former rugby commentator
 * John Edward Costigan, American artist
 * John Costigan (hurler)
 * Keith Costigan, former soccer player, and television sports analyst
 * Kyle Costigan, American Football Player, Strength and Conditioning Coach for the University of Wisconsin-Madison
 * Mabel Cory Costigan (1873–1951), on the advisory council of the National Child Labor Committee and vice president of the National Consumers League.
 * Michael Costigan (entrepreneur)
 * Michael Costigan (film producer)
 * Michael Costigan (youth speaker)
 * Neville Costigan, Australian rugby league footballer
 * Peter Costigan, (1935–2002), Australian journalist, former Lord Mayor of Melbourne
 * Sandra Costigan, former field hockey player

Fictional characters:
 * Billy Costigan, a character in the Martin Scorsese film, The Departed, played by Leonardo DiCaprio
 * Captain Costigan, a character in the novel Pendennis, by William Makepeace Thackeray.
 * Sailor Steve Costigan, a character created by Robert E. Howard
 * Conway Costigan, a character in E.E. Smith's Triplanetary
 * Jerry, Grace and Russell Costigan, characters in Robert B. Parker's novel "A Catskill Eagle"