"Lothair Udo II (c. 1025 – 1082) was Margrave of the Nordmark from 1057 until his death and also Count of Stade (as Lothair Udo III). He was the only son of Lothair Udo I of the Udonids and Adelaide of Rheinfelden.
The power base of his family lay around Harsefeld and Stade, but through advantageous marriages, they had control of almost the entire eastern third of the Duchy of Saxony in lands and rights.
In 1044, William became Margrave of the Nordmark. In 1056, the Saxons were defeated by the Liutizi at the Battle of Pritzlawa (Havelmündung), and William was killed. The Emperor Henry III and Lothair Udo I died the same year. Lothair Udo II came into a very strong position and became margrave the next year." - (en.wikipedia.org 13.03.2021)
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