Dreux de Monchy III , Chevalier, seigneur de Monchy La Gache et de Berneuil, Somme, FR

   FamilySearch ID: G19X-KRL.

Dreux married Edith de Warenne, daughter of Sir William de Warenne, 1st Earl of Surrey and Gundred de St Omer. (Edith de Warenne was born in 1076 in Mapledurham Manor, Oxfordshire, England, died after 1155 in , Sussex, England and was buried about 1160 in Jerusalem, Jerusalem Mutasarrifate, Ottoman Empire.)