Nielsen Hayden genealogy
Friedrich I von Burglengenfeld

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- 1 Friedrich I von Burglengenfeld [1] d. Aft 1050
Sigena d. Between 1110 and 1123
- 2 (Unknown) von Burglengenfeld [1.1]
Ruotger
- 3 Freidrich III von Pettendorf [1.1.1]
d. 3 Apr 1119
Heilika of Swabia b. 1087 d. Aft 1110
- 4 Heilika von Lengenfeld [1.1.1.1]
d. 14 Sep 1170 [ =>]
- 4 Heilika von Lengenfeld [1.1.1.1]
- 3 Freidrich III von Pettendorf [1.1.1]
- 2 (Unknown) von Burglengenfeld [1.1]