Lewis & Short

Mămilĭus, a [root mar-, the shining, splendid one; cf. marmor],

  1. I. name of a Roman gens.
      1. 1. Octavius Mamilius, a prince of Tusculum, Liv. 1, 50.
      2. 2. C. Mamilius Limetanus, a tribune of the people, Sall. J. 40, 1.
      3. 3. C. Mamilius Vitulus, a prætor, Cic. Verr. 2, 2, 50, § 123; Sall. J. 40.
      4. 4. L. Mamilius Tusculanus, Liv. 3, 29.
        Hence,
  2. II. Mămilĭus, a, um, adj., of or belonging to a Mamilius, Mamilian: rogatio, of the tribune Mamilius, Cic. Brut. 33, 127; Sall. J. 40, 4: lex, Cic. Brut. 34, 128; id. Leg. 1, 21, 55; Sall. J. 65, 5: turris, Paul. ex Fest. p. 131; v. Müll. ad loc.