This generation of Robert Aguillon is not sourced. I am making the assumption based on the date of birth of Robert Aguillon m. Joan de Ferrers .vs. the age of his parents (without this generation of Robert in between). Plus the Margery de Aguillon who m. Jordan Sackville is apparently not the same as the Margery de Aguillon who m. Giles de Argentein, because they were both married to different husbands at about the same time. The Margery who m. Jordan Sackville is not a daughter of Robert Aguillon who m. Joan Ferrers because his only daughter and heir was Isabel, who m. Hugh Bardolf.