Word.ws English Dictionary

O'Sullivan

UK/əʊˈsʌl.ɪv.ən/US/oʊˈsʌl.əv.ən/

O'Sullivan proper noun: a surname from Irish.

Proper noun

O'Sullivan

  1. A surname from Irish.

Origin of O'Sullivan

From Irish Ó Súilleabháin.

Words formed from O'Sullivan

Questions about O'Sullivan

What does O'Sullivan mean?
O'Sullivan means a surname from Irish.
What part of speech is O'Sullivan?
O'Sullivan is a proper noun.
How do you pronounce O'Sullivan?
O'Sullivan is pronounced /əʊˈsʌl.ɪv.ən/ (UK).

Words near O'Sullivan in the dictionary

  1. O'Sheridan
  2. O'Sheridans
  3. O'Shields
  4. O'Such
  5. O'Suches
  6. O'Sullivan
  7. O'Sullivan's law
  8. o'th'
  9. O'Toole
  10. O'Ward
  11. O'Wards

Source and license

Adapted from Wiktionary: O'Sullivan (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'Sullivan.” Word.ws, https://word.ws/o%27sullivan. Based on Wiktionary, CC BY-SA 4.0.