Nielsen Hayden genealogy
Family: Friedrich I-III of Nurenberg / Helene of Saxony (F17560)
m. Bef 10 Apr 1280Konrad I of Nurenberg (1186-1260) 
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| Albrecht I of Saxony (1180-1261)
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Helene of Brunswick-Lüneburg (1223-1273)
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Albrecht II of Saxony ( -1298)  |
| Friedrich I-III of Nurenberg (1220-1297)
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| Helene of Saxony ( -1309)
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| Friedrich IV of Nurenberg (1287-1332) |