Dietrich II, Margrave of Lower Lusatia

Theodoric II (German: Dietrich; c. 990 – 19 November 1034) was Margrave of Lusatia from 1032 to 1034, the first of the Wettin dynasty.

He was the only son of Count Dedo I, Count of Wettin (c. 950 – 1009) and his wife Thietburga, a daughter of Count Dietrich of Haldensleben, the first margrave of the Northern March. Theodoric thereby was a grandson of the Wettin progenitor Theodoric I.

At Christmas 1009, after his father was killed in a fierce struggle with Margrave Werner of the Northern March, Theodoric was vested with the County of Wettin in the Saxon Hassegau (ruling as Theodoric II) by King Henry II of Germany at Pöhlde. From 1015, he also appeared as a and count in the neighbouring Schwabengau. Upon the death of his uncle Frederick I, who had died without male issue in 1017, he inherited Eilenburg and Brehna. In 1018, Theodoric and his brother-in-law, Margrave Herman I of Meissen acted as witnesses when the Peace of Bautzen was concluded between Emperor Henry II and the Polish ruler Bolesław I the Brave, ending a lengthy German–Polish War.