Ó Ceallacháin

Ó Ceallacháin, anglicised Callihan, is an Irish surname. Notable people with the surname include:


 * 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 journeyman plumber