Simon de Montfort and Eleanor of Leicester had seven children, many of whom were notable in their own right:[17]
1.Henry de Montfort (November 1238 – 1265)
2.Simon the Younger de Montfort (April 1240 – 1271)
3.Amaury de Montfort, Canon of York (1242/1243-1300)
4.Guy de Montfort, Count of Nola (1244–1288). Elizabeth Woodville, Queen Consort of Edward IV of England, was one of Guy's descendants through his daughter, Anastasia de Montfort, Countess of Nola.
5.Joanna de Montfort (born and died in Bordeaux between 1248 and 1251).
6.Richard de Montfort (d.1266). Date of death is not certain.
7.Eleanor de Montfort (1252–1282). She married Llywelyn ap Gruffudd, Prince of Wales, honouring an agreement that had been made between Earl Simon and Llywelyn. Eleanor, Lady of Wales, died on 19 June 1282 at the royal Welsh home at Abergwyngregyn, on the north coast of Gwynedd, giving birth to a daughter, Gwenllian of Wales. After Llywelyn's death on 11 December 1282, Gwenllian was captured by King Edward I and spent the rest of her life in a convent.