Horgan Family History
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Horgan Name Meaning
shortened Anglicized form of Gaelic Ó hAragáin, a reduced form of Ó hAnradgáin (see Hanrahan). (County Cork): shortened Anglicized form of Gaelic Ó hArgáin ‘descendant of Argán’. 1 and 2 are related, but arose from variants that existed in Irish before Anglicization.
Source: Dictionary of American Family Names ©2013, Oxford University Press