Nielsen Hayden genealogy
Descendants of Helene of Brunswick-Lüneburg
1223 - 1273 (50 years)Father: Otto I of Brunswick-Lüneburg (1204 - 19 Jun 1252)
Mother: Matilde von Brandenburg (Abt 1210 - 10 Jun 1261)
Helene of Brunswick-Lüneburg (18 Mar 1223 - 6 Sep 1273)
Albrecht I of Saxony (Abt 1180 - 8 Nov 1261)(m. Between 1247 and 1248)
   ├─ Albrecht II of Saxony ( - 25 Aug 1298 Aken, Saxony-Anhalt, Germany)
   │ Agnes of Habsburg (Abt 1257 - 11 Oct 1322 Wittenberg, Saxony-Anhalt, Germany)
   │ (m. Oct 1273 Aachen, Westphalia, Germany)
   │ (m. Oct 1273 Aachen, Westphalia, Germany)
   │    ├─ Anna of Saxe-Wittenberg ( - 22 Nov 1327 bur.Wismar, Mecklenburg-Vorpommern, Germany)
   │    │ Heinrich II of Mecklenburg (Abt 1267 Riga, Latvia -
   │    │ 21 Jan 1329 Sternberg, Mecklenburg-Vorpommern, Germany)(m. 6 Jul 1315)
   │    │ 21 Jan 1329 Sternberg, Mecklenburg-Vorpommern, Germany)(m. 6 Jul 1315)
   │    │     + Heinrich II of Holstein (Between 1316 and 1318 - Bef 17 Apr 1390)(m. Abt 1366)
   │    └─ Rudolf I of Saxony (Abt 1280 - 12 Mar 1356 bur.Wittenberg, Saxony-Anhalt, Germany)
   │     Agnes of Lindow-Ruppin ( - 9 May 1343 bur.Franciscan cloister, Wittenberg, Saxony-Anhalt, Germany)
   │     (m. Aft 9 Apr 1331)
   │     (m. Aft 9 Apr 1331)
   │        └─ Wenzel of Saxony (Abt 1337 - 15 May 1388 Hannover, Lower Saxony, Germany) =>
   │         + Cäcilie da Carrara (Abt 1347 - 1427 Zahna, Wittenberg, Saxony-Anhalt, Germany)(m. 29 Jan 1367)
   └─ Helene of Saxony ( - 12 Jun 1309 bur.Nuremberg, Bavaria)
    + Henryk III (Between 1227 and 1230 - 3 Dec 1266)
    Friedrich I-III of Nurenberg (Abt 1220 - 14 Aug 1297)(m. Bef 10 Apr 1280)
       └─ Friedrich IV of Nurenberg (Aft 15 Aug 1287 - 19 May 1332 Nürnberg, Bavaria, Germany)
        Margareta of Görz ( - Between 26 Jun 1348 and 27 Sep 1348 bur.Cloister Church, Birkenfeld, Rhineland-
        Palatinate, Germany)(m. Bef 2 Aug 1307)
        Palatinate, Germany)(m. Bef 2 Aug 1307)
           └─ Johann I of Nürnberg ( - 7 Oct 1357 bur.Heilsbronn Cloister, Heilsbronn, Bavaria, Germany) =>
            + Elizabeth of Henneberg (Bef 7 Dec 1317 - Between 6 Dec 1377 and 30 May 1391 bur.Cloister Church,
            Birkenfeld, Rhineland-Palatinate, Germany)(m. Bef 3 Mar 1333)
            Birkenfeld, Rhineland-Palatinate, Germany)(m. Bef 3 Mar 1333)