Germanic hero who appears in the Middle High German poems of Ortnit and Wolfdietrich in Das Heldenbuch (see Heldenbuch, Das) as the son of Hugdietrich, emperor of Constantinople. Repudiated by his father, who mistakenly believes him illegitimate, he is brought up by the emperor's faithful retainer Berchtung von Meran. Berchtung and his 16 sons support Wolfdietrich, who, after his father's death, is driven from his inheritance by his own brothers. After a long exile in Lombardy at the court of King Ortnit, the hero returns to liberate Berchtung's imprisoned sons and regain his kingdom. Among the exploits of Wolfdietrich is his killing of the dragon that had slain Ortnit.

The story of Wolfdietrich attached itself to the family of Clovis, king of the Franks. Some critics believe Hugdietrich to be the epic counterpart of Theodoric (Dietrich); the name might be a Latinized form of Hugo Theodericus, eldest son of Clovis. Wolfdietrich would thus represent Theodoric's son Theodebert (d. 548), whose succession was disputed by his uncles. But father and son are merged by a process of epic fusion, so that Wolfdietrich appears to be the counterpart sometimes of Theodoric and sometimes of Theodebert.

The story of how Hugdietrich won his bride Hildburg, daughter of the king of Salonika, forms in one manuscript version a separate introduction to the Wolfdietrich romance.