Nielsen Hayden genealogy
Descendants of Constance of Antioch
Father: Bohemund II, Prince of Antioch (1108 - Feb 1130)
Mother: Alix of Réthel ( - Aft 1136)
Constance of Antioch
Renaud de Châtillon-sur-Loing (m. Abt 1153)
   └─ Anna de Châtillon (1154 - 1184)
    Béla III, King of Hungary, Croatia, Dalmatia, and Rama (Abt 1148 - 18 Apr 1196)(m. Abt 1171)
       ├─ Constance of Hungary ( - 4 Dec 1240)
       │ Przemysl Ottokar I, King of Bohemia (Abt 1155 - 15 Dec 1230)(m. Abt 1198)
       │    ├─ Anna of Bohemia (Between 1201 and 1204 Prague, Bohemia - 23 Jun 1265) =>
       │    │ + Henryk II of Silesia (Between 1196 and 1204 - 9 Apr 1241 Legnica, Lower Silesia, Poland)
       │    │ (m. Between 1214 and 1218)
       │    │ (m. Between 1214 and 1218)
       │    └─ Wenceslas I, King of Bohemia (1205 - 22 Sep 1253) =>
       │     + Kunigunde von Hohenstaufen (Between Jan 1202 and Mar 1202 -
       │     13 Sep 1248 bur.St. Veit, Prague, Bohemia)(m. 1224)
       │     13 Sep 1248 bur.St. Veit, Prague, Bohemia)(m. 1224)
       ├─ Margaret of Hungary (1175 - Aft 1222)
       │ + Isaac II Angelos, Emperor of Byzantium (Constantinople;Sep 1156 - Jan 1204)
       └─ András II, King of Hungary (1176 - 21 Sep 1235)
        Yolanda of Courtenay, Queen Consort of Hungary (Abt 1200 - 1233)
        :   └─ Violant of Hungary ( - 12 Oct 1251 bur.Cistercian Monastery of Vallbona, Catalonia, Spain) =>
        :    + James I, King of Aragón (2 Feb 1208 Montpellier, Hérault, France -
        :    27 Jul 1276 Alzira, Valencia, Spain)(m. 8 Sep 1236 Barcelona, Catalonia, Spain)
        :    27 Jul 1276 Alzira, Valencia, Spain)(m. 8 Sep 1236 Barcelona, Catalonia, Spain)
        Gertrud von Meran (Abt 1185 - 28 Sep 1213)(m. Bef 1203)
           │ + Iwan Asen II, Tsar of Bulgaria (Abt 1190 - Jun 1241)(m. Jan 1221)
           │ + Maria Laskarina (Abt 1206 of Nicea, Anatolia - 1270)(m. Abt 1218)
            + Ludwig II (28 Oct 1200 - 11 Sep 1227 Otranto, Apulia, Italy)
            (m. 1220 Wartburg, Eisenach, Thuringia, Germany)
            (m. 1220 Wartburg, Eisenach, Thuringia, Germany)