Nielsen Hayden genealogy
Descendants of Constance of Sicily
- 1198Father: Roger II, King of Sicily (Between 22 Dec 1095 and 1097 - Between 27 Jan 1154 and 26 Feb 1154)
Mother: Beatrice de Vitry-Réthel (Between 1130 and 1135 - 31 Mar 1185)
Constance of Sicily ( - 27 Nov 1198)
Heinrich VI, Holy Roman Emperor (Nov 1165 - 28 Sep 1197 Messina, Sicily)(m. 27 Jan 1186 Milan, Lombardy, Italy)
   └─ Friedrich II, Holy Roman Emperor (26 Dec 1194 - 13 Dec 1250)
    Bianca Lancia (Abt 1212 - ??)
    :   └─ Manfredo, King of Sicily (1232 - 26 Feb 1266)
    :    Beatrice of Savoy (4 Mar 1223 - Bef 10 May 1259)(m. Abt 1248)
    :       └─ Constance of Sicily (1249 - 1301 Barcelona, Catalonia, Spain) =>
    :        + Pedro III, King Of Aragón; King Of Sicily (Jul 1240 - 11 Nov 1285)
    :        (m. 13 Jun 1262 Montpellier, Hérault, France)
    :        (m. 13 Jun 1262 Montpellier, Hérault, France)
    (Unknown mistress of Friedrich II)
    :   └─ Margherita de Svevia ( - Between 1297 and 1298)
    :    Tommaso d'Aquino (Abt 1220 - 14 Mar 1273 bur.St. Maria delle Monache, Capua, Campania, Italy)(m. 1247)
    :        + Guglielmo II Etendard ( - Aft 1281)
    Isabella of England (1214 - 1 Dec 1241)(m. 20 Jul 1235 Worms, Germany)
       └─ Margarethe von Hohenstaufen (Abt Feb 1237 - 8 Aug 1270 Frankfurt-am-Main, Germany)
        Albrecht II of Meissen (1240 - 20 Nov 1315)(m. 1254)
           ├─ Friedrich I of Meissen (1257 - 16 Nov 1323 Wartburg, Eisenach, Thuringia, Germany) =>
           │ + Elisabeth von Lobdeburg-Arnshaugk (1286 - 22 Aug 1359 Gotha, Thuringia, Germany)(m. 24 Aug 1300)
            + Heinrich I of Brunswick (Aug 1267 - 7 Sep 1322)(m. 1282)