O'Callaghan
O'Callaghan ( Irish Ó Ceallacháin , "descendant of Ceallachán", "Little Ceallach") is the anglisierte form of an originally patronymic formed lastname Irish origin.
Name bearer
- Donncha O'Callaghan (born 1979), Irish rugby union player
- John O'Callaghan (* 1982), Irish DJ
- John O'Callaghan (The Maine) (born 1988), American singer
- José O'Callaghan Martínez (1922–2001), Spanish theologian and papyrologist
- Joseph F. O'Callaghan (* 1928), American historian
- Matthew O'Callaghan , American director
- Mike O'Callaghan (1929-2004), American politician
- Pat O'Callaghan (1905–1991), Irish hammer thrower and Olympic champion
- Xavier O'Callaghan (* 1972), Spanish handball player and handball official