Lewis & Short

Rū̆brĭus, i, m.; Rū̆brĭa, ae, f.,

  1. I. the name of a Roman gens; masc. Rubrius, Cic. Verr. 2, 1, 25, § 64; id. Phil. 2, 16, 40; id. Brut. 45, 168; Caes. B. C. 1, 23.
    Fem. Rubria, Cic. Fam. 9, 21, 3.
    Adj.: Lex Rubria (or lex Galliae Cisalpinae), of the year B. C. 43; v. Becker, Antiq. 3, 1, p. 51, and the authors there cited.
    Hence,
  2. II. Rū̆brĭ-ānus, a, um, adj., of or belonging to a Rubrius, Rubrian: senatusconsultum, Dig. 40, 5, 26, § 9; 40, 5, 28 pr.