Rudolf II, Margrave of Hachberg-Sausenberg

Margrave Rudolf II of Hachberg-Sausenberg (medieval: Rudolf II of Hachberg-Susenberg) (1301–1352) was the son of Margrave Rudolf I of Hachberg-Sausenberg and his wife Agnes, the heiress of Otto of Rötteln. After their elder brother Henry died in 1318, Rudolf II and his younger brother Otto I took up government in Rötteln and Sausenberg. They moved their seat of government from Sausenburg Castle to Rötteln Castle. In the fall of 1332, troops from the City of Basel besieged Rötteln Castle, because one of the brothers had stabbed the mayor of Basel. The conflict was settled after mediation by the nobility of the city and the margraviate.

Marriage and issue
Rudolf II was married to Catherine, the daughter of Ulrich of Thierstein. Two children are documented:
 * Rudolf III (1343–1428), his successor
 * Agnes (d. around 1405), married Baron Burkhard II of Buchegg (d. after 10 June 1365)