Lewis & Short

Trēvĕri (Trēvĭri), ōrum, m.

  1. I. A people in Gallia Belgica, between the Moselle and the forest of Ardennes, in and about the mod. Treves, Caes. B. G. 1, 37; 2, 24; 3, 11; 6, 8 et saep.; Mel. 3, 2, 4; Plin. 4, 17, 31, § 106; Liv. Epit. 107 al.
    In sing.: Trēvĭr, one of the Treviri, Tac. H. 3, 35; 4, 55; Luc. 1, 441.
    In a pun with tresviri, Cic. Fam. 7, 13, 3.
    1. B. Afterwards, the town of the Treviri, the mod. Treves, Amm. 15, 11, 9; called, at an earlier date, Augusta Trevirorum, Mel. 3, 2, 4.
  2. II. Hence, Trēvĕ-rĭcus, a, um, adj., of or belonging to the Treveri: ager, Plin. 18, 20, 49, § 183; 11, 49, 109, § 262: tumultus, Tac. A. 3, 42 fin.: proelium, id. H. 5, 17: urbs, i. e. Treves, Aus. Urb. 4.