Irish: Anglicized form of Gaelic Ó Cianáin ‘son of
Cianán’, a personal name from a diminutive of cian
‘distant’, ‘long’, or possibly of Mac Fhinghin ‘fair
offspring’.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
400,291
Historical Documents & Family Trees with Keenan
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The information for this chart came from the U.S. Immigration Collection at Ancestry.com.
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