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Meaning & History
Lahey and Leahy originate from two different Gaelic surnames. Lahey, Lahy, Lahiff, Lahiffe, Laffey, and Lahive all originate from the Gaelic surname O Laithimh, which itself is a variant of O Flaithimh. O Flaithimh derives from the Irish word flaitheamh, which means lord or ruler.