Irish: reduced Anglicized form of Gaelic Mag
Fhionnbhairr ‘son of Fionnbharr’, a personal name composed
of fionn ‘fair’, ‘white’ + barr ‘top’, ‘head’.
Welsh and English: from the female personal name Gaenor (a
form of Welsh Gwenhwyfar, a compound of gwen ‘fair’,
‘white’ + (g)wyf ‘smooth’, ‘yielding’ + fawr
‘large’. This was the name of King Arthur’s queen Guinevere).
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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