Leahy, ó Laochdha A Gaelic surname meaning descendant of Laochdha, meaning ‘heroic’. In 1890 Leahy was principally found in Cork, Kerry, Limerick and Tipperary, and the estimated number of bearers was 4,700 (including variants). In the United States it is the 3,528th most numerous surname with an estimated 8,250 bearers.
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