Nielsen Hayden genealogy
Family: Valdemar II Sejr, King of Denmark / Berengaria (F15175)
m. Between 1213 and 1214-
Father | Male
Valdemar II Sejr, King of Denmark
Born 28 Jun 1170 Died 28 Mar 1241 Buried Married Between 1213 and 1214 [1] Father Valdemar I den Store, King of Denmark | F15026 Group Sheet Mother Sofie of Polotsk | F15026 Group Sheet
Mother | Female
Berengaria
Born Abt 1194 Coimbra, Portugal 
Died 27 Mar 1221 Ringsted, Zealand, Denmark 
Buried Father Sancho I, King of Portugal | F15149 Group Sheet Mother Dulce of Barcelona | F15149 Group Sheet
Child 1 | Male
+ Erik IV-VI, King of Denmark
Born 1216 Died 10 Aug 1250 Buried Spouse Jutta of Saxony | F15271 Married 17 Nov 1239
Child 2 | Female
+ Sophie of Denmark
Born 1217 Died 2 Nov 1247 Flensburg, Schleswig-Holstein, Germany 
Buried Spouse Johann I of Brandenburg | F15174 Married 1236
Child 3 | Male
+ Abel, King of Denmark
Born 1218 Died 29 Jun 1252 Buried Spouse Mechtilde von Holstein | F17379 Married 25 Apr 1237
Child 4 | Male
+ Christoffer I, King of Denmark
Born 1219 Died 29 May 1259 Ribe, Jutland, Denmark 
Buried Ribe, Jutland, Denmark 
Spouse Margarete Tczewsko-Lubiszewska | F15176 Married 1248 Fehmarn, Ostholstein, Germany 
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Sources - [S49] Genealogics, by Leo Van de Pas.
- [S49] Genealogics, by Leo Van de Pas.