Schwennicke, Detlev, ed., Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten, New Series. XII: Schwaben. Marburg: Verlag von J. A. Stargardt, 1992. Information from this source tagged as [Ref: ES XII #[0-9]*].
Sources for birth and parent Information
father:
[Ref: ES XII #128]
Sources for death Information
date:
[Ref: ES XII #128]
1250 [Ref: ES XII #32]
Sources for burial Information
place:
[Ref: ES XII #128]
Sources with Information about marriage to Mechtilde Of Kyburg
names:
[Ref: ES XII #32],
child:
[Ref: ES XII #128]
Research Notes:
Count of Rapperswil [Ref: ES XII #128]