Nielsen Hayden genealogy
Family: Heinrich I von Hessen / Adelheid of Brunswick-Lüneburg (F15369)
m. Bef 10 Sep 1263Henri II of Brabant (1207-1248) 
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Sophia von Thüringen (1224-1275)
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| Otto I of Brunswick-Lüneburg (1204-1252)
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| Matilde von Brandenburg (1210-1261)
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Agnes of Brunswick-Lüneburg ( -1302)  |
| Helene of Brunswick-Lüneburg (1223-1273) |
| Albrecht I (1236-1279) |
| Heinrich I von Hessen (1244-1308)
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| Adelheid of Brunswick-Lüneburg ( -1274)
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| Sophia of Hesse ( -1331) |
| Adelheid of Hesse (1268-1317) |
| Otto I von Hessen (1272-1328) |