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Surname Etymology and Meaning of MCSWEENEY

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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 Mac Suibhne ‘son of Suibhne’, a byname meaning ‘pleasant’. Compare McQueeney, which is from the lenited form.

Source: Dictionary of American Family Names (2003)