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Male Jean I de Ponthieu Click to view Jean I de Ponthieu in the family tree

Jean I de was born about 1135.  Jean I de's father was Guy II de Ponthieu and his mother was Ida de St. Pol.  His paternal grandparents were Guillaume III Duke Alencon and Alice UNKNOWN; his maternal grandfather was Hugues III de St. Pol.  He was an only child.  He died in 1191.


Jean I de's family with Beatrice de ST. POL

‌Jean I de and Beatrice de were married in a religious ceremony before 1179.  They had a son and two daughters, named William III, Maud de and Adele de.

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