Duke Otto of Saxony I

  General Notes:

Otto rarely left Saxony. He was a regional prince and his overlords, Louis the Younger and Emperor Arnulf of Carinthia, with both of whom he was on good terms, rarely interfered in Saxony. In Saxony, Otto was king in practice and he established himself as tributary ruler over the neighbouring Slav tribes, such as the Daleminzi.
http://en.wikipedia.org/wiki/Otto_the_Illustrious

Otto married Hedwiga of Franconia, daughter of Duke Henry of Franconia and Ingeltrude of Friuli.