Nielsen Hayden genealogy
Family: Infant Fernando of Castile / Laure de Montfort (F27448)
m. Aft 1256
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Male
Infant Fernando of Castile
Birth Aft 1239 Death Bef 1269 France 
Burial Marriage Aft 1256 [1] Father St. Fernando III, King Of Castile, León, Galicia, Toledo, Córdoba, Jaén, and Seville | F3808 Group Sheet Mother Jeanne de Dammartin | F3808 Group Sheet
Female
Laure de Montfort
Birth Death Bef Aug 1270 Burial Father Amuary VII de Montfort | F15584 Group Sheet Mother Béatrix de Viennois | F15584 Group Sheet
Male
+ Jean I de Ponthieu
Birth Aft 1264 Death 11 Jul 1302 Kortrijk, Flanders 
Burial Spouse Ide de Meullent | F27447 Marriage
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Sources - [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.
- [S49] Genealogics by Leo Van de Pas, continued by Ian Fettes and Leslie Mahler.