Northern March
Dietrich (Theoderich, Theodoric) of Haldensleben (died 25 August 985) was a Saxon count in the Schwabengau, later also in the Nordthüringgau and the Derlingau, who was the first Margrave of the Northern March from 965 until the Great Slav Rising of 983. He also bore the title of a "dux" (duke) in contemporary sources.