Nielsen Hayden genealogy
Descendants of Constance of Hungary
Father: Béla IV, King of Hungary (1206 - 3 May 1270)
Mother: Maria Laskarina (Abt 1206 of Nicea, Anatolia - 1270)
Constance of Hungary
Leo Danilowitsch, King of Halicz (Abt 1228 - 1301)(m. Between 1251 and 1252)
   └─ Jurij I Lvovitsch, King of Halicz (24 Apr 1252 - 1308)
    Euphemia of Kujawien ( - 18 Mar 1308)
       └─ Marija Jurjewma of Halicz (Bef 1293 - 11 Jan 1341)
        Trojden I of Masovia (Between 1284 and 1286 - 13 Mar 1341)(m. Bef 1310)
           └─ Euphemia of Masovia (Abt 1310 - Aft 1373 bur.Cieszyn, Silesia, Poland)
            Casimir I of Silesia (Between 1276 and 1280 - Aft 21 Sep 1358 bur.Cieszyn, Silesia, Poland)
            (m. Between 1321 and 1324)
            (m. Between 1321 and 1324)
               └─ Anna of Silesia (Abt 1325 -
                1367 bur.Collegiate Church of the Holy Sepulchre, Legnica, Lower Silesia, Poland)
                1367 bur.Collegiate Church of the Holy Sepulchre, Legnica, Lower Silesia, Poland)
                Wenzel I of Silesia (Between 1310 and 1318 - 2 Jun 1364 bur.Collegiate Church of the Holy
                Sepulchre, Legnica, Lower Silesia, Poland)(m. Between 1338 and 1340)
                Sepulchre, Legnica, Lower Silesia, Poland)(m. Between 1338 and 1340)
                   └─ Ruprecht of Silesia (Between 1340 and 1347 -
                    Bef 12 Jan 1409 bur.Legnica, Lower Silesia, Poland)
                    Bef 12 Jan 1409 bur.Legnica, Lower Silesia, Poland)
                    Jadwiga of Silesia (Bef 1350 - 27 Mar 1390 bur.Legnica, Lower Silesia, Poland)
                    (m. Bef 10 Feb 1372)
                    (m. Bef 10 Feb 1372)
                       └─ Barbara of Silesia-Liegnitz ( - 16 May 1435)
                        Rudolf III of Saxony (Abt 1373 -
                        9 Jun 1419 bur.Wittenberg, Saxony-Anhalt, Germany)(m. 6 Mar 1396)
                        9 Jun 1419 bur.Wittenberg, Saxony-Anhalt, Germany)(m. 6 Mar 1396)
                           └─ Barbara of Saxony (Abt 1406 - 10 Oct 1465 Bayreuth, Bavaria, Germany) =>
                            + Johann "the Alchemist" of Brandenburg (Bef 29 Sep 1403 -
                            16 Nov 1464 Baiersdorf, Bavaria, Germany)(m. 26 May 1412)
                            16 Nov 1464 Baiersdorf, Bavaria, Germany)(m. 26 May 1412)