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O'Reilly

Updated: January 22, 2024
Updated: January 22, 2024

Family name origins & meanings

  • Irish : Anglicized form of Gaelic Ó Raghailligh ‘descendant of Raghailleach’, Old Irish Roghallach, a personal name of unexplained etymology. This is the name of a chieftain family in County Cavan, related to the O’Rourkes.

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