Schwennicke, Detlev, ed., Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten, New Series. XVI: Bayern und Franken. Marburg: Verlag von J. A. Stargardt, 1995. Information from this source tagged as [Ref: ES XVI #[0-9]*].
Sources for birth and parent Information
father:
[Ref: ES XVI #38]
Sources for death Information
date:
25.VII 1276-81 [Ref: ES XVI #38, ES XVI #47]
Sources with Information about marriage to Helwig Of Plain