Lewis & Short

Tungri, ōrum, m., a people of Gallia Belgica, near the modern Tongres, Plin. 4, 17, 31, § 106; 31, 2, 8, § 12; Tac. G. 2; id. H. 2, 14 sq.; 4, 16, 55; Amm. 15, 11, 7; Inscr. Orell. 3399.
In sing.: Tunger, Sil. 7, 682; Inscr. Grut. 334, 3.