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Surname Etymology and Meaning of SHEEHAN

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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’Sheehan, an Anglicized form of Gaelic Ó Síodhacháin ‘descendant of Síodhachán’, a personal name representing a diminutive of síodhach ‘peaceful’, the same word as sítheach. Compare Sheehy.

Source: Dictionary of American Family Names (2003)