Usdibad (Latin: Usdibadus, Uzdibaldus;[a] fl.
566–567) was a Gepid military commander (dux) and fugitive that received refuge by Byzantine Emperor Justin II (r. 565–574) during the Lombard–Gepid War (567).
In 566, Lombard king Alboin concluded a treaty with the Pannonian Avars, to whom he promised the Gepids' land in case they won over them.
[1] The Byzantine Emperor intervened and took control of Sirmium (now Sremska Mitrovica, Serbia), also giving refuge to Gepid leader Usdibad, but the rest of Gepidia was taken by the Avars.
[2] According to István Bóna, Usdibad was probably a secret rival of Cunimund, and crossed the Sava to the Byzantines after the defeat.