Irish: reduced Anglicized form of Gaelic Ó Lachtnáin
‘descendant of Lachtnán’, a personal name from
lachtna ‘gray’. This is the name of several families in
Ireland, and has more often been Anglicized as Loughlin or
Loughran, and in County Cork as Lawton.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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