Nielsen Hayden genealogy
Descendants of Otto I, Holy Roman Emperor
912 - 973 (60 years)Father: Heinrich I "The Fowler", King of Germany (Abt 876 - 2 Jul 936 Membleben, Lower Saxony, Germany)
Mother: St. Matilda (Abt 890 - 14 Mar 968 Quedlinburg, Saxony-Anhalt, Germany)
Otto I, Holy Roman Emperor (23 Nov 912 - 7 May 973 Membleben, Lower Saxony, Germany)
Eadgyth ( - 26 Jan 946 bur.Monastery of Maritius, Magdeburg, Lower Saxony, Germany)(m. 930)
:   ├─ Liudolf (930 - 6 Sep 957 bur.St. Albans Abbey, Mainz, Hessen, Germany)
:   │ Ida of Swabia ( - 17 May 986)(m. 948)
:   │    └─ Reginlint
:   │     Konrad of Swabia and Oenningen (Abt 920 - 20 Aug 997)
:   │        │ + Friedrich I of Diessen ( - Aft 1003)
:   │         + Adalbert ( - 1033)
:   └─ Luitgarde (Abt 931 - 18 Nov 953)
:    Conrad the Red ( - 10 Aug 955)(m. 947)
:       └─ Otto of Worms (Abt 947 - 4 Nov 1004)
:        Judith ( - 991)
:           ├─ Pope Gregory V ( - 18 Feb 999 Rome)
:           └─ Henry of Speyer (Abt 968 - 989 bur.Worms Cathedral, Worms, Germany) =>
:            + Adelaide of Alsace
St. Adelaide of Italy (Abt 931 - 16 Dec 999 Seltz, Bas-Rhin, Alsace, France)(m. 951)
   └─ Otto II, Holy Roman Emperor (955 - 7 Dec 983 Rome)
    Theophano (Between 955 and 956 - 15 Jun 991 Nijmegen, Netherlands)
       └─ Mathilde von Sachsen (979 - 4 Dec 1025 Echtz, Düren, Germany)
        Ezzo of Lotharingia (Abt 955 - 21 May 1034)
           ├─ Richeza of Lotharingia (Abt 998 - 21 Mar 1063 Saalfield, Thuringia, Germany) =>
           │ + Mieszko II Lambert, King Of Poland ( - May 1034)(m. 1013)
            + Mathilde von Zutphen