Otto V. von Wassserburg, Count of Wasserburg, was born circa 1066 to Arnold III. von Dießen (c1050-c1096) and Gisela von Schweinfurt (?-?) and died 3 November 1112 Battle of Iringisheim of battle wounds. Charlemagne (747-814), Charlemagne (747-814)/s.
It may also be that he stems from the first marriage of his mother to Heinrich von Wasserburg, or from the second marriage of his father to Adelheid von Sulzbach.