Rudolf I (died 7 December 1124), Margrave of the Nordmark and Count of Stade, son of Lothair Udo II, Margrave of the Nordmark, and Oda of Werl, daughter of Herman III, Count of Werl, and Richenza of Swabia. Rudolf was the brother of his predecessors Henry I the Long and Lothair Udo III. In 1106 Rudolf became Margrave of Nordmark and Count of Stade after the death of his brother Lothair Udo III, as regent and guardian for Lothair's son Henry II. The Count of Stade was effectively administered by Friedrich while Henry II was still underage.