Nielsen Hayden genealogy
Descendants of Otto II, Holy Roman Emperor
955 - 983 (28 years)Father: Otto I, Holy Roman Emperor (23 Nov 912 - 7 May 973 Membleben, Lower Saxony, Germany)
Mother: St. Adelaide of Italy (Abt 931 - 16 Dec 999 Seltz, Bas-Rhin, Alsace, France)
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)
       │    │ + Béla I, King of Hungary (Between 1015 and 1020 - 11 Sep 1063 Kinizsa Creek, Hungary)
       │    │ (m. Between 1039 and 1043)
       │    │ (m. Between 1039 and 1043)
       │    ├─ Casimir I, Duke Of Poland (25 Jul 1016 Krakow, Malowpolskie, Poland -
       │    │ 28 Nov 1058 Poznan, Wielkopolskie, Poland) =>
       │    │ 28 Nov 1058 Poznan, Wielkopolskie, Poland) =>
       │    │ + Maria Dobronega (Aft 1011 - 1087)(m. 1038)
       │    └─ Gertrude-Olisava of Poland (Abt 1020 Krakow, Malowpolskie, Poland - 4 Jan 1107) =>
       │     + Iziaslav I, Grand Prince of Kiev (1025 - 3 Oct 1078)(m. Abt 1043)
       └─ Liudolf (Abt 1000 - 10 Apr 1031)
        Mathilde von Zutphen
            + Gottschalk (Abt 1020 - Between 1063 and 1064)