Son of Frederick of Büren, Count in Riesgau and Hildegard of Egisheim‏.

Born ‎± 1050
Died ‎before 21 Jul 1105‎

Daughter of Henry IV of Germany, Holy Roman Emperor and Bertha of Savoy‏.

Born ‎1072
Died ‎24 Sep 1143‎, 70 or 71 years, ‎1st married/ related to: Frederick I of Swabia, ‎2nd marriage to: Leopold III of Austria, Saint, Margrave of Austria