Theoderic the Great
The first known bearer of the name was Theodoric I, son of Alaric I, king of the Visigoths (d. 451). The Gothic form of the name would have been "Þiudareiks", which was Latinized as "Theodericus". The notability of the name is due to Theoderic the Great, son of Theodemir, king of the Ostrogoths (454–526), who became a legendary figure of the Germanic Heroic Age as Dietrich von Bern.