The o'leary Surname
o'leary Name Meaning and History
Irish (Munster): Americanized form of Ó Laoghaire
‘descendant of Laoghaire’, a byname originally meaning ‘keeper
of the calves’, from laogh ‘calf’. This was the name of a
5th-century king of Ireland.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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