Nielsen Hayden genealogy
Family: Johann "the Alchemist" of Brandenburg / Barbara of Saxony (F13303)
m. 26 May 1412Friedrich I of Brandenburg (1371-1440) 
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Elisabeth of Bavaria (1383-1442)
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| Rudolf III of Saxony (1373-1419)
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| Barbara of Silesia-Liegnitz ( -1435)
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| Johann "the Alchemist" of Brandenburg (1403-1464)
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| Barbara of Saxony (1406-1465)
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Dorothea of Brandenburg (1430-1495)  |