Lewis & Short

Carnūtes, um, m., = Καρνοῦτοι, a people in Gaul, on both sides of the Liger, whose chief town was Autricum, now Chartres, in the Départ. d’Eure et Loire, Caes. B. G. 2, 35; 5, 25; 5, 56; 6, 2; 6, 4; 7, 2; 8, 31; ap. Tib. 1, 7, 12.
Adj.: Carnōtēnus, a, um, of or belonging to the Carnutes, Sulp. Sev. Dial. 3, 2 al.
As subst.: Carnūtē-ni, ōrum, m., = Carnutes, Plin. 4, 18, 32, § 107 Jan.