Lewis & Short

Helvĭi (Helvi), ōrum, m.,

  1. I. a people of Gallia Narbonensis, whose capital, called Alba Helvorum and Alba Helvia, was celebrated for its wine, now Alps, in Viviers, Départ. Ardèche, Caes. B. G. 7, 7; 75; id. B. C. 1, 35; Plin. 3, 4, 5, § 36; 14, 3, 4, § 43.
  2. II. Deriv.: Helvĭcus, a, um, adj., of or belonging to the Helvii, Helvian: vinum, Plin. 14, 1, 3, § 18.