Thietmar, Margrave of the Saxon Ostmark

Thietmar (IV) (born ca. 1000; died 10 January 1030) was the Count of the Schwabengau and Nordthüringgau from 1010 and the Margrave of the Saxon Ostmark from 1015 until his death. He was the son and successor of Margrave Gero II. His mother was Adelaide.