Hartwig (1118-October 1168), Count of Stade and Archbishop of Bremer, son of Rudolf I, Margrave of the Nordmark, and Richardis, daughter of Hermann von Sponheim, Burgrave of Magdeburg. Hartwig became the last Count of Stade belonging to the House of Udonids in 1144 when his brother Rudolf died. He succeeded Adalbero as Archbishop of Bremen in August 1148. He is regarded as the most politically significant Archbishop of Bremen of the 12th century.