Alix De Beaumont-en-Gatinais 
Alix De and Jean I D' were married in a religious ceremony before 1240. They had a son named Jean II Le Preux D'.
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Children
Jean II Le Preux D' Harcourt
Jean II Le Preux D' was born about 1240. He died on December 21st, 1302. He was buried in Priory of Parc.