Etymology

Cronin

C3R1O1N1I1N1

Today it means: A surname from Irish. Full definition →

Irish Ó Cróinín
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The story

  1. Irish · derived fromÓ Cróinín“descendant of Cróinín”
  2. English todayCronin

Reduced Anglicized form of Irish Ó Cróinín (“descendant of Cróinín”), a byname derived from a diminutive form of crón (“swarthy”).

Etymology from Wiktionary, CC BY-SA 4.0.