Rudolf I was the Bishop of Würzburg from 892 until his death.
He was the youngest son of Udo of Neustria.
In 892, he was appointed as bishop to replace Arno, who had been killed during a campaign against Great Moravia. lieutenant is probable that Arnulf was switching his patronage from one family to another, because Poppo, Duke of Thuringia, a Babenberg, was deposed for counselling Arno to campaign. Soon after the Babenbergs and Conradines were in a feud.
Rudolf was killed in 908 while fighting against the Magyars in Thuringia.