Word.ws English Dictionary

O'Callaghan

O'Callaghan proper noun: a surname from Irish.

Proper noun

O'Callaghan

  1. A surname from Irish.

Origin of O'Callaghan

Variant of Callahan.

Questions about O'Callaghan

What does O'Callaghan mean?
O'Callaghan means a surname from Irish.
What part of speech is O'Callaghan?
O'Callaghan is a proper noun.

Words near O'Callaghan in the dictionary

  1. O'Brien
  2. O'Brien County
  3. O'Brien potatoes
  4. O'Briens
  5. O'Bummer
  6. O'Callaghan
  7. O'Casey
  8. O'Cawley
  9. O'Clery
  10. o'clock
  11. o'clockish

Source and license

Adapted from Wiktionary: O'Callaghan (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “O'Callaghan.” Word.ws, https://word.ws/o%27callaghan. Based on Wiktionary, CC BY-SA 4.0.