Nielsen Hayden genealogy
Family: Valdemar II Sejr, King of Denmark / Berengaria (F15175)
m. Between 1213 and 1214Valdemar I den Store, King of Denmark (1131-1182) 
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Sofie of Polotsk (1140-1198)
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Richiza of Denmark ( -1220)  |
| Sophie Valdemarsdatter of Denmark (1159-1208) |
| Helene of Denmark (1180-1233) |
| Sancho I, King of Portugal (1154-1211)
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| Dulce of Barcelona (1159-1198)
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| Afonso II, King of Portugal (1185-1223) |
| Valdemar II Sejr, King of Denmark (1170-1241)
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| Berengaria (1194-1221)
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| Erik IV-VI, King of Denmark (1216-1250) |
| Sophie of Denmark (1217-1247) |
| Abel, King of Denmark (1218-1252) |
| Christoffer I, King of Denmark (1219-1259) |