Nielsen Hayden genealogy
Descendants of Johann I of Brandenburg
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Father: Albrecht II of Brandenburg
(Abt 1177 - 25 Feb 1220)
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Mother: Mathilde von Nieder-Lausitz
( - 1255)
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Johann I of Brandenburg (1213 - 4 Apr 1266)
:       └─ 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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   │
Eric V Klipping, King of Denmark
(1249 Lolland, Denmark - 22 Nov 1286 Finderup, Viborg, Denmark)
   │ (m. 11 Nov 1273)
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   │ (m. 11 Nov 1273)
   │         + Gerhard III of Holstein
(Abt 1293 - 1 Apr 1340 Sankt Mortens, Randers, Denmark)(m. Abt 1314)
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   └─ Heinrich I of Brandenburg
(Abt 1260 - 14 Feb 1318 bur.Chorin Cloister, Chorin, Brandenburg, Germany)
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Agnes of Bavaria
(Between 1276 and 1278 - 22 Jul 1345 Sangerhausen, Saxony-Anhalt, Germany)
    (m. Aft Nov 1298 Nürnberg, Bavaria, Germany)
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    (m. Aft Nov 1298 Nürnberg, Bavaria, Germany)
       
Magnus I of Brunswick
(Abt 1304 - Between 15 Jun 1369 and 15 Aug 1369 bur.St. Michaelis, Lüneberg, Lower
        Saxony, Germany)(m. Abt 1327)
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        Saxony, Germany)(m. Abt 1327)
           │ + Dietrich IV of Honstein
( - Between 1378 and 1379)(m. Aft 1350)
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           └─ Magnus II of Brunswick
(Abt 1328 - 25 Jul 1373 Leveste, Lower Saxony, Germany) =>
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            + Katharina of Anhalt
( - 30 Jan 1390)(m. Bef 6 Oct 1356)
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