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Meaning and Origin of: Reilly

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First name origins & meanings:

  • Gaelic : Valiant
  • Gaelic : Valiant

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Last name origin & meaning:

  • Irish : reduced form of O’Reilly, an Anglicized form of Gaelic Ó Raghailligh ‘descendant of Raghailleach’, Old Irish Roghallach, of unexplained origin.

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