At his father's death in 1239 Rudolph inherited the family estates in Alsace, and in 1245 he married Gertrude, daughter of Burkhard III. count of Hohenberg.
At his father's death in 1239, Rudolph inherited the family estates in Alsace and Aargau. In 1245 he married Gertrude, daughter of Burkhard III, Count of Hohenberg.