 Dedo's dispute with the House of Walbeck continued with Lothair's son and successor Werner von Walbeck (1003–1009; died 1014).Dedo was killed by Werner on 13 November 1009 along with his vassals near Mose at the confluence of the Tange and Elbe rivers.Dedo and Thietburga of Haldensleben had the following children