Isabel De Vermandois (daughter of Hugues De France and Adelle Vermandois) was born 1085 in Valois, Bretagne, France, and died 13 Feb 1131 in St Nicaise, Meulan, D-Sens, France.She married Robert De Beaumont on 1096 in ,Valois, Bretagne, France, son of Roger De Beaumont and Adeliza Meulent. More About Isabel De Vermandois and Robert De Beaumont: Marriage: 1096, ,Valois, Bretagne, France. Children of Isabel De Vermandois and Robert De Beaumont are: