William Earl Callihan (May 15, 1916 - August 23, 1986) was a professional American football running back in the National Football League.
Callaghan most commonly refers to O'Callaghan, an Anglicized Irish surname.
Callahan may refer to.
Michael Callihan (born August 7, 1947) was a democrat who was the 42nd Lieutenant Governor of Colorado, serving from 1987 to 1994 under Roy Romer.
Ryan G. Callahan (born March 21, 1985) is an American professional ice hockey right winger and an alternate captain for the Tampa Bay Lightning of the National Hockey League (NHL).
Seán Óg Ó Ceallacháin (12 May 1923 – 17 February 2013) was a journalist, author and broadcaster and former Gaelic footballer and hurler with Dublin and Eoghan Ruadh.