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Updated June 9, 2019

Family name origins & meanings

  • Portuguese (Osório) and Spanish : from a medieval personal name Osorius, of uncertain origin. It is perhaps a metathesized form of Latin Orosius (Greek Orosios, a derivative of oros ‘mountain’), the name borne by a 4th-century Iberian theologian and historian, who was famous in Spain throughout the Middle Ages.

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