Margaret Peverel ^{1 2}

   Another name for Margaret was Margaret Ferrers Countess of Derby.

  Research Notes:

From Wikipedia - Margaret Ferrers, Countess of Derby :

Margaret Peverel (born c.1114) was a 12th century Countess of Derby , who lived at Tutbury Castle in the English county of Staffordshire .

Margaret was the daughter of William Peverel the Younger of Peveril Castle in Derbyshire and his wife, Avicia de Lancaster . Her grandfather was William Peverel . She married Robert Ferrers and thus became Countess of Derby. She was the mother of William de Ferrers, 3rd Earl of Derby , Walkelin de Derby and a daughter, Petronella.

Margaret married Robert de Ferrieres 2nd Earl of Derby, son of Robert de Ferrières 1st Earl of Derby and Hawise de Vitré, about 1135 in Nottinghamshire, England. (Robert de Ferrieres 2nd Earl of Derby was born about 1090 in Derbyshire, England, died in 1162 in Merevale, Warwickshire, England and was buried in Merevale Abbey, Merevale, Warwickshire, England.)