He married twice:
To Sybil Marshal He married (1st) Sibyl Marshal, a daughter of
William Marshal, 1st Earl of Pembroke, by his wife
Isabel de Clare, 4th Countess of Pembroke, by whom he had seven daughters: • Agnes de Ferrers (d. 11 May 1290), who married (as his second wife)
William de Vesci (d.1253); • Isabel de Ferrers (died before 26 November 1260), who married (1)
Gilbert Basset, of
Wycombe, and (2) (as his second wife) Reginald II de Mohun,
feudal barony of Dunster in Somerset, father-in-law of her sister Joan. • Maud de Ferrers (died 12 March 1298), who married (1) Simon de Kyme (died 1248), (2)
William de Vivonne (died 1259), and (3)
Amaury IX, Viscount of Rochechouart. • Sibyl de Ferrers, who married (as his first wife) Frank de Bohun, of
Midhurst, great-nephew of
Savaric FitzGeldewin; • Joan de Ferrers (died 1267) married: • (1) Sir John de Mohun, master of Dunster (died 1253 in Gascony), with
John de Mohun (1248–79), feudal baron of Dunster as probable issue; and • (2) (as his first wife) Sir
Robert II Aguillon of Addington; • Agatha de Ferrers (died May 1306), married Hugh Mortimer, younger son of
Ralph de Mortimer; • Eleanor de Ferrers (died 16 October 1274) married (1) William de Vaux, (2) in about 1252 (as his 3rd wife)
Roger de Quincy, 2nd Earl of Winchester, and (3) in about 1265
Roger de Leybourne.
To Margaret de Quincy :
Gules, seven mascles or conjoined 3:3:1. These arms were adopted by the descendants of William de Ferrers, 5th Earl of Derby and his wife Margaret de Quincy (see
Baron Ferrers of Groby), in lieu of their paternal arms of
Vairy or and gules He married (2nd) in 1238 Margaret or Margery de Quincy (c. 1218 - 12 March 1280), daughter and heiress of
Roger de Quincy, 2nd Earl of Winchester, by his wife
Helen of Galloway. When Margaret's father married (as his 3rd wife) Eleanor de Ferrers (d.1274), she became both step-mother and step-daughter of Eleanor. By Margaret de Quincy he had two sons and three daughters: •
Robert de Ferrers, 6th Earl of Derby (1239–1279), eldest son and heir, who married firstly (aged 10) Mary de Lusignan, a daughter of
Hugh XI de Lusignan,
Count of Angoulême, and a niece of King Henry III. He married (2nd) in 1269 Eleanor de Bohun, daughter of Sir Humphrey V de Bohun, of
Kimbolton Castle, by his wife
Eleanor de Braose. of
Groby in
Leicestershire, younger son, who having been granted by his mother
Groby Castle, founded the junior line of
Ferrers of Groby. He married firstly Anne Durward, possibly the widow of
Colbán, Earl of Fife and a daughter of
Alan Durward, by whom he had issue: •
William Ferrers, 1st Baron Ferrers of Groby (1272–1325), who assumed the arms of de Quincy (
Gules, seven mascles or conjoined 3:3:1) in lieu of his paternal arms; :He married (2nd) Eleanor de Lovaine, a daughter of Matthew de Lovaine, who after her husband's death was abducted by and married to
William the Hardy, Lord of Douglas. • Joan de Ferrers (died 19 March 1309), who married
Thomas de Berkeley, 1st Baron Berkeley of
Berkeley Castle in Gloucestershire; • Agnes de Ferrers, who married (1) Sir Robert de Musgrove, of
Kemerton,
Boddington &
Deerhurst (2)
John FitzReginald. •
Elizabeth de Ferrers, who married (1) William Marshal, killed at the
Battle of Evesham in 1265 (2)
Dafydd ap Gruffydd, a prince of
Gwynedd. ==Death, burial & succession==