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Surname Etymology and Meaning of CASLIN

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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: Anglicized form of Gaelic Ó Caisealáin ‘descendant of Caisealán’, a diminutive of Caisile, a variant of the byname Caiside (see Cassidy).

Source: Dictionary of American Family Names (2003)