Original sentence: He was the son of [Simon de Montfort and Amice de Harcourt] and grandson ofSimon III de Montfort, lord of Montfort l'Amaury in France near Paris, and Amicia de Beaumont, daughter of Robert de Beaumont, 3rd Earl of Leicester - the de Montfort line itself descends from the Counts of Flanders
Edited sentence: He was the son of Simon III de Montfort, lord of Montfort l'Amaury in France near Paris, and Amicia de Beaumont, daughter of Robert de Beaumont, 3rd Earl of Leicester - the de Montfort line itself descends from the Counts of Flanders