Nielsen Hayden genealogy
Family: Otto III of Brandenburg / Beatrix of Bohemia (F15058)
m. Jan 1243Albrecht II of Brandenburg (1177-1220) 
|
Mathilde von Nieder-Lausitz ( -1255)
|
Matilde von Brandenburg (1210-1261)  |
| Johann I of Brandenburg (1213-1266) |
| Wenceslas I, King of Bohemia (1205-1253)
|
| Kunigunde von Hohenstaufen (1202-1248)
|
| Przemysl Ottokar II, King of Bohemia (1230-1278) |
| Otto III of Brandenburg (1215-1267)
|
| Beatrix of Bohemia ( -1286)
|
| Otto V of Brandenburg (1246-1299) |
| Mathilde von Brandenburg (1248-1316) |