Guillaume de Breteuil de la Ferte-Arnaud

   FamilySearch ID: 9CXH-VMC.

Guillaume married Constance de Courtenay, daughter of Pierre de France I - Seigneur de Courtenay, de Montargis, de Châteaurenard, de Champignelles, de Tanlay, de Charny et de Charenton and Élisabeth de Courtenay. (Constance de Courtenay was born about 1168 in Courtenay, Loiret, Centre, France, died about 1231 in Abtei Fontevrault, Maine-et-Loire, Pays de la Loire, Frankreich and was buried in Abtei Fontevrault, Maine-et-Loire, Pays de la Loire, Frankreich.)