shortened Anglicized form of Gaelic Ó
hAinchín ‘descendant of Ainchín’, a personal name
possibly related to the personal name Annach (see
Hanna), unless it is a variant of ainghein ‘unborn’.
shortened Anglicized form of Gaelic Ó hAnnacháin (see
Hanahan).
shortened Anglicized form of Gaelic Ó
hAnnáin (see Hannan).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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