Nielsen Hayden genealogy
Family: Abel, King of Denmark / Mechtilde von Holstein (F17379)
m. 25 Apr 1237Valdemar 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) |
| Christoffer I, King of Denmark (1219-1259) |
| Adolf IV of Holstein (1192-1261)
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| Hedwig von der Lippe ( -1250)
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| Gerhard I of Holstein (1232-1290) |
| Abel, King of Denmark (1218-1252)
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| Mechtilde von Holstein (1225-1288)
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| Sophie Abelsdatter of Denmark & S¢nderjylland (1240-1285) |