The earliest known Irish surname is O’Clery (O Cleirigh); it’s the earliest known because it was written that the lord of Aidhne, Tigherneach Ua Cleirigh, died in County Galway back in the year 916 ...
Genealogist Barry Griffin used data from the 1901 and 1911 Irish censuses to plot out surnames on the map of Ireland More than 6,000 Irish surnames are included on a website compiled by genealogist ...
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