Rafferty, ó Raithbheartaigh A Gaelic surname derived from rath bheartach meaning ‘prosperty wielder’. A sept which originated in the Sligo Donegal area. In 1890 Rafferty was principally found in Antrim, Tyrone and Louth, and the estimated number of bearers was 2,464. In the United States it is the 4,018th most numerous surname with an estimated 8,250 bearers.
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