MacKenna, Mac Cionaoith A Gaelic surname meaning son of Cionaodh, which personal name meant ‘fire-sprung’. A sept of the southern Uí Neill, who were chiefs of the barony of Trough in the north of Monaghan. A sept in Roscommon who were followers of ó Conchobhair. The name is corrupted to Mag Cineáith in Kerry Cork and Limerick. In 1890 McKenna was the eighty-eight most numerous surname and the estimated number of bearers was 9,000. In that year the surname was chiefly found in Antrim, Monaghan, Tyrone, Kerry, Armagh, Dublin and Louth. Kenna was principally found in Dublin and Tipperary (estimated bearers 940). In the United States it is the 1,603rd most numerous surname with an estimated 22,000 bearers.
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