Nielsen Hayden genealogy
Descendants of Úfhildr Ólafsdóttir
Abt 1023 - 1070 (~ 47 years)Father: St. Olaf II Haraldsson, King of Norway (Abt 995 - 31 Aug 1030 Stiklestad, Verdal, Nord-Trøndelag, Norway)
Mother: Astrid Ólafsdóttir ( - Between 1021 and 1022)
Úfhildr Ólafsdóttir (Abt 1023 - 24 May 1070)
Ordulf of Saxony (Abt 1020 - 28 Mar 1072)(m. Nov 1042)
   └─ Magnus of Saxony (Abt 1045 - 23 Aug 1106 bur.Artlenburg, Lower Saxony)
    Sophia of Hungary (Abt 1050 - 18 Jun 1095)(m. Between 1070 and 1071)
       ├─ Wulfhilde of Saxony (Abt 1075 - 29 Dec 1126 Weingarten Abbey, Ravensburg, Upper Swabia, Germany)
       │ Henry IX of Bavaria (1074 - 13 Dec 1126 Ravensburg, Upper Swabia, Germany)(m. Abt 1100)
       │    │ + Gebhard III of Sulzbach (Abt 1114 - 28 Oct 1188)(m. 1129)
       │    │ + Rudolf von Bregenz ( - Between 27 Apr 1160 and 28 Apr 1160)
       │    │ + Gertrud von Süpplinburg (18 Apr 1115 - Abt 18 Apr 1143)(m. 29 May 1127)
       │    └─ Judith of Bavaria (19 May 1100 - Aft 22 Feb 1130 bur.Waldburg, Heiligen Forst, Alsace) =>
       │     + Frederick II von Hohenstaufen (1090 - 4 Apr 1147)(m. 1121)
       └─ Eilica von Sachsen (Abt 1080 - 16 Jan 1142)
        Otto von Ballenstedt (Abt 1075 - 9 Feb 1123)
            + Sophia von Winzenburg ( - 8 Jun 1160)(m. Abt 1125)