Ostrogotha was a leader of the eastern Goths in Ukraine, who invaded Roman Moesia during the Crisis of the Third Century, mentioned by the 6th-century historian Jordanes.
Cassiodorus, one of the sources of Jordanes, also mentioned Ostrogotha as one of the ancestors of Amalasuintha, daughter of Theoderic the Great.
After several victories, including a successful defence against a Roman counterattack, Jordanes claimed that the Goths likened their leaders to demigods or "Ansis" (XIII 78).
According to Jordanes, Ostrogotha was part of the Amal family, whose genealogy he recited, making him an ancestor of Ermanaric and Theodoric the Great (XIV 79).
Jordanes reported that Ostrogotha crossed the Danube during the reign of Philip the Arab and invaded the provinces of Moesia and Thrace.