http://fmg.ac/Projects/MedLands/SWABIA.htm#FriedrichIStaufenSwabiadied1105B

FRIEDRICH von Büren

FRIEDRICH von Büren, son of FRIEDRICH von Büren & his wife Hildegard --- ([1050]-1105 before 21 Jul, bur Lorsch Monastery).

• m (betrothed Regensburg 24 Mar 1079, 1089) as her first husband, AGNES of Germany, daughter of Emperor HEINRICH IV King of Germany
• Duke Friedrich & his wife had [twelve] children:
• 1. [HEILIKA von Staufen (-after 1110, bur Kloster Ensdorf).
• 2. BERTRADA [Bertha] von Staufen . The primary source which confirms her parentage and marriage has not yet been identified. m ADALBERT, Graf.
• 3. FRIEDRICH von Staufen (1090-Alzey 4 or 6 Apr 1147, bur Walburg Abbey). He succeeded his father as FRIEDRICH II "der Einäugige" Duke of Swabia in 1105. m firstly ([1119/21]) JUDITH of Bavaria, daughter of HEINRICH "dem Schwarzen" Duke of Bavaria [Welf] & his wife Wulfhild of Saxony [Billung] m secondly ([1132/33]) AGNES von Saarbrücken, daughter of FRIEDRICH I von Saarbrücken Graf im Saargau & his wife Gisela
• 4. HILDEGARDIS von Staufen .
• 5. KONRAD von Staufen (1093-Bamberg 15 Feb 1152, bur Bamberg Cathedral). The primary source which confirms his parentage has not yet been identified. He was elected in 1138 as KONRAD III King of Germany.
• 6. GISELA von Staufen [Giselhildis].
• 7. HEINRICH von Staufen (-before 1102).
• 8. BEATRIX von Staufen (-after 1146).
• 9. KUNIGUNDE [Kunizza] von Staufen . The primary source which confirms her parentage and marriage has not yet been identified. m HEINRICH, Herzog.
• 10. SOPHIA von Staufen . The primary source which confirms her parentage and marriage has not yet been identified. m ADALBERT, Graf.
• 11. GERTRUD von Staufen (-after 1182). m ([1127]) HERMANN von Stahleck Graf von Stahleck, son of GOSWIN Graf von Stahleck & his wife Luitgard von Heimbach (-Ebrach 2 Oct 1156, bur Ebrach, transferred to Bildhausen). He was installed in [1138] as HERMANN III Pfalzgraf von Lothringen by his brother-in-law Konrad III King of Germany, resigned in 1155.]
• 12. RICHILDE von Staufen ([1100]-). m (after 1117) as his second wife, HUGUES "Cholet" Comte de Roucy, son of EBLES [II] Comte de Roucy & his wife Sibylle of Apulia ([1090]-[1160], bur Reims St Thierry).

------------------------------------------------

http://en.wikipedia.org/wiki/Conrad_III_of_Germany

http://de.wikipedia.org/wiki/Konrad_III._%28HRR%29

http://www.thepeerage.com/p11426.htm#i114256