Meaning

origin* As an English and Scottish surname, variant of Kerr. * As an Irish surname, from the root of the surname Keary, from ciar (“black”); compare Carey. * Also as an Irish surname, named after a priest Cathair (compare cathair (“fort”)) * Also as an Irish surname, from a personal name derived from corr (“pointed, projected point”).

Etymology from Wiktionary, CC BY-SA 3.0