Lewis & Short

Burgundĭōnes, um, m., and Bur-gundĭi, ōrum, m., a tribe of Goths, divided into the East Burgundians, who dwelt between the Oder and the Vistula, and the West Burgundians, upon the upper Main.

        1. (α) Form Burgundiones, Plin. 4, 14, 28, § 99; Mamert. I. Pan. 5 init.
        2. (β) Form Burgundii, Amm. 28, 5, 9 sqq.; Mamert. II. Pan. 17 init.
          Sing.: Burgundĭo, ōnis, m., a Burgundian, Sid. Carm. 7, 234.
          As adj.: Burgundiones equi, Veg. Vet. 6, 6, 3.