Nielsen Hayden genealogy
Descendants of Przmyslaw I
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Father: Wladislaw Odonicz
(Abt 1190 - 5 Jun 1239)
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Mother: Jadwiga
( - 29 Dec 1249)
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Przmyslaw I (1220 - 4 May 1257)
       └─ Agnes of Brandenburg
( - 4 Jun 1330 bur.St. Nikolai, Zerbst, Saxony-Anhalt, Germany)
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Albrecht I of Anhalt
( - Between 17 Aug 1316 and 2 Mar 1317)(m. 1300)
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Bernhard III of Anhalt
( - 20 Aug 1348)(m. Abt 1339)
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               └─ Katharina of Anhalt
( - 30 Jan 1390)
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Magnus II of Brunswick
(Abt 1328 - 25 Jul 1373 Leveste, Lower Saxony, Germany)
                (m. Bef 6 Oct 1356)
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                (m. Bef 6 Oct 1356)
                   ├─ Agnes of Brunswick-Lüneburg
( - 21 Mar 1410)
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                   │
Albrecht I of Brunswick
(Abt 1339 - Between 11 Aug 1383 and 22 Sep 1383 Salzderhelden,
                   │ Lower Saxony, Germany)(m. Bef 17 Aug 1372)
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                   │ Lower Saxony, Germany)(m. Bef 17 Aug 1372)
                   │    └─ Erich of Brunswick
( - 28 May 1427 bur.St. Alexander, Einbeck, Lower Saxony,
                   │     germany)
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                   │     germany)
                   │    
Elizabeth of Brunswick-Göttingen
( - Aft 29 Sep 1444)
                   │     (m. Between 1 Jul 1405 and 14 Jul 1405)
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                   │     (m. Between 1 Jul 1405 and 14 Jul 1405)
                   │        └─ Anna of Brunswick-Grubenhagen
(Abt 1420 -
                   │         9 Oct 1474 Nannhofen, Bavaria, Germany)
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                   │         9 Oct 1474 Nannhofen, Bavaria, Germany)
                   │         + Albrecht III of Bavaria
(Munich, Bavaria, Germany;27 Mar 1401 - 29 Feb 1460)
                   │         (m. 22 Jan 1437 Munich, Bavaria, Germany)
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                   │         (m. 22 Jan 1437 Munich, Bavaria, Germany)
                   └─ Elisabeth of Brunswick-Lüneburg
(Abt 1370 - Bef 3 Apr 1422)
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Gerhard V of Holstein
(Abt 1367 - 5 Aug 1404 Suderhamme, Dithmarschen)(m. 1395)
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                       └─ Heilwig of Holstein
(1398 - Bef 11 Nov 1436 bur.Oldenburg, Lower Saxony,
                        Germany)
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                        Germany)
                       
Dietrich of Oldenburg
( - 14 Feb 1440 Delmenhorst, Lower Saxony, Germany)
                        (m. 23 Nov 1423)
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                        (m. 23 Nov 1423)
                           └─ Christian I, King of Denmark, Norway, and Sweden
(Feb 1426 -
                            21 Mar 1481 Copenhagen, Denmark) =>
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                            21 Mar 1481 Copenhagen, Denmark) =>
                            + Dorothea of Brandenburg
(1430 - 10 Nov 1495 Kalundborg, Denmark)
                            (m. 28 Oct 1449 Copenhagen, Denmark)
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                            (m. 28 Oct 1449 Copenhagen, Denmark)