Irish: Anglicized form of Gaelic Ó Catháin ‘descendant
of Cathán’, a personal name derived from cath
‘battle’. As lords of Keenaght in County Derry the O’Kanes were a
leading sept in Ulster up to the time of the plantation (early 17th
century).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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