Duke Liudolf of Saxony

  General Notes:

duke of the Eastern Saxons (dux orientalis Saxonum, probably since 850) and count of Eastphalia. Liudolf had extended possessions in eastern Saxony, and was a leader (dux) in the wars of King Louis the German against Normans and Slavs. The ruling Liudolfing House, also known as the Ottonian dynasty, is named after him; he is its oldest verified member.
http://en.wikipedia.org/wiki/Liudolf,_Duke_of_Saxony

Liudolf married Oda, daughter of Billing and Aeda. (Oda was born circa 806 and died on 17 May 913.)