O'Callaghan
| Pronunciation | UK: /əˈkæləhən, -ɡən, -hæn/ US: /oʊˈkæləhən, -hæn/ |
|---|---|
| Language(s) | English |
| Origin | |
| Language(s) | Irish |
| Word/name | Ó Ceallacháin |
| Derivation | ceallach |
| Meaning | 'contention' |
| Other names | |
| Variant form(s) | O'Callahan, Callahan, Calligan, O'Kelaghan, Kelaghan, Kealahan |
O'Callaghan or simply Callaghan without the prefix (anglicized from two separate surnames and clans, Ó Ceallacháin, Munster Clan. Ó Ceileacháin, Oriel Clan) is an Irish surname.