Family name origins & meanings
- Irish : (Sligo) Anglicized form of Gaelic Ó Croidheáin ‘descendant of Croidheán’, from a diminutive of croidhe ‘heart’. Compare Creegan.
- Irish : (originally Mayo and Tyrone) Anglicized form of Gaelic Ó Creacháin or Ó Criocháin, from a diminutive of creach ‘blind’.