Lewis & Short

Nervĭi, ōrum, m.,

  1. I. a people of Belgic Gaul, in the modern Hainault, Caes. B. G. 1, 4; 2, 15 sq.; Tac. G. 28; id. H. 4, 15; 33; 56 al.
    In sing., Luc. 1, 428.
    Hence,
  2. II. Nervĭcus, a, um, adj., Nervian: proelium, Caes. B. G. 3, 5.