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Substantivised form of the Proto-Italic adjective *swezrīnos (of the sister). The regular descendant would be *suebrīnus. The change swe- > so- occurred only before a following non-front vowel, which did not occur in this word but did in soror. Thus, the initial so- is probably by analogy.[1]


sōbrīnus m (genitive sōbrīnī); second declension

  1. maternal cousin (male)


Second declension.

Case Singular Plural
nominative sōbrīnus sōbrīnī
genitive sōbrīnī sōbrīnōrum
dative sōbrīnō sōbrīnīs
accusative sōbrīnum sōbrīnōs
ablative sōbrīnō sōbrīnīs
vocative sōbrīne sōbrīnī

Related termsEdit



  • sobrinus in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
  • sobrinus in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
  • sobrinus in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette
  1. ^ De Vaan, Michiel (2008) Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill