Ancestral File Number: 9G84-0M.
A History of thePlantagenets, Vol II, The Magnificent Century, Thomas B Costain, 1951, Doubleday & Co
p186: "Simon de Montfort was a Norman. The family name was derived from a small castle called Montfort l' Amauri in the lower corner of the duchy, but the importance of his ancestors was far greater than this might suggest. They traced descent back to Charles the Bald, and one of the warrior counts (all the Montforts were great fighting men) had married an heiress of Evreux with wide possessions as well as illustrious connections..."
Ancestral File Ver 4.10 9G84-0M Simon EUREUX< EVREUX.
Simon married BEAUMONT, daughter of Count Robert De Beaumont MEULAN, I and Countess Isabel De Vermandois SURREY. (BEAUMONT was born about 1104.)