Margaret Peverell, Countess of Derby (b. circa 1114, Nottinghamshire, England), was an English noblewoman who lived at Tutbury Castle in Staffordshire, England. Family and marriage Margaret was the daughter of William Peverel the Younger of Peveril Castle in Derbyshire According to Burke's Dormant, Abeyant, Forfeited and Extinct Peerages, she married Robert de Ferrers, 2nd Earl of Derby and thus became Countess of Derby. She was the mother of William de Ferrers, 3rd Earl of Derby and William De Ferrers, Lord of Eggington and a daughter, Petronella.{Burke's Dormant, Abeyant, Forfeited and Extinct Peerages} She died in 1154 and was buried in Merevale Abbey. References 12th-century births 12th-century deaths English countesses 12th-century English people 12th-century English women People from Derbyshire People from the Borough of East Staffordshire