Rudolf III, Margrave of Hachberg-Sausenberg

Margrave Rudolf III of Hachberg-Sausenberg (1343–1428) was the son of Margrave Rudolf II of Hachberg-Sausenberg and Catherine of Thierstein. He inherited Hachberg-Sausenberg when his father died in 1352. As he was a minor at the time, his uncle Otto I acted as regent. When Rudolf II came of age, he and Otto I ruled jointly, until Otto's death in 1384. Rudolf III is considered the most important of the Margraves of Hachberg-Sausenberg.