Wegener quotes a reference to Otto son of Graf Perhtold dated 16 May 1060. Graf von Thanning [1073]. Graf von Ambras 1078/1093. Graf von Wolfratshausen 1098/1116. Graf von Diessen 1100/1107.
The De Fundatoribus Monasterii Diessenses records the death "VIII Kal Mai" of "Otto comes de Wolfraczhausen maior domus", specifying that he was buried "in…Sancti Stephani…iuxta fratrem suum". The De Fundatoribus Monasterii Diessenses records the death "VIII Kal Mai" of "Otto comes de Wolfraczhausen maior domus", specifying that he was buried "in…Sancti Stephani…iuxta fratrem suum". 1
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