The mckiernan Surname
mckiernan Name Meaning and History
Northern Irish: Anglicized form of Gaelic Mac
Thighearnáin, a patronymic from a lenited diminutive of the
personal name Tighearna ‘lord’, ‘master’ (Old Irish
tigern). Compare Tiernan.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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