Ó Ceallacháin

Ó Ceallacháin, primarily anglicised '''O'Callaghan as well as variants of Callihan''', is an Irish surname. Notable people with the surname include:

*Pat O'Callaghan (1906–1991), Irish hammer-thrower *Seán Óg Ó Ceallacháin (1923–2013), journalist, author and broadcaster *Bill Callihan (1916–1986), American football player *Mike Callihan (b. 1947), Lieutenant Governor of Colorado *Ryan Callahan, American hockey player *Shane Callahan (b. 1995), American actor Provided by Wikipedia