http://en.wikipedia.org/wiki/Isabel_de_Verdun,_Lady_Ferrers_of_Groby

Isabel married Henry de Ferrers, 2nd Lord Ferrers of Groby (born before 1303- 15 September 1343) in 1328 at Newbold Verdon, Leicestershire. He was the son of William de Ferrers, 1st Lord Ferrers of Groby and Ellen de Seagrove. She was eleven years old at the time of her marriage. The marriage produced at least five children, four of whom survived infancy:

1.Infant, whose name and sex is not known, died shortly after birth.

2.William de Ferrers, 3rd Lord Ferrers of Groby (28 February 1333 Newbold Verdon- 8 January 1371), married Margaret de Ufford, daughter of Robert d'Ufford, 1st Earl of Suffolk and Margaret de Norwich, by whom he had issue, including Henry de Ferrers, 4th Lord Ferrers of Groby, who married Joan de Hoo, and Margaret de Ferrers, who married Thomas de Beauchamp, 12th Earl of Warwick.

3.Ralph de Ferrers, married Joan de Grey of Codnor.

4.Elizabeth de Ferrers (died 22 October 1375), married firstly David de Strathbogie, 12th Earl of Atholl, by whom she had issue. She married secondly, John Malewayn.[2]

5.Philippa de Ferrers (died 10 August 1384), married Guy de Beauchamp, son of Thomas de Beauchamp, 11th Earl of Warwick and Katherine Mortimer, by whom she had two daughters.

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http://freepages.genealogy.rootsweb.ancestry.com/~bhusler/Bill/Reunion/Web%20Cards/ps04/ps04_012.html