Rudolf (Latin: Ruadolfus) was a Frankish nobleman of the House of Welf, attested as the duke of Rhaetia in 890–892.
[3] In 864, Conrad was described as "duke of the Rhaetians and a part of the Jura" (Raeticarum vel Jurensium partium dux).
In 890, Rudolf was described as simply "duke of the Rhaetians" (dux Raetionorum), although this might not be taken to exclude his rule in part of the Jura as well.
Although it is probable, it cannot be proved that the same Rudolf held each of these counties or that he was the same person as the later duke of Rhaetia; the evidence is too sparse.
[5] By 903 Rudolf had been succeeded in Rhaetia by Burchard I, who would expand ducal authority, leading to the creation of the duchy of Swabia.