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Surname Etymology and Meaning of TIERNEY

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Name meanings and etymologies are often disputed. The information here is compiled from freely available sources, and no claims whatsoever are made for accuracy, either historical or etymological.

Irish: reduced form of O’Tierney, an Anglicized form of Gaelic Ó Tíghearnaigh ‘descendant of Tighearnach’, a byname meaning ‘lord’, ‘master’. The Gaelic name is sometimes ‘translated’ as English Lord.

Source: Dictionary of American Family Names (2003)