William De Ferrers VII Earl of Derby
William De Ferrers VII Earl of was born in 1196 in Groby, Derbyshire, England.

 Margaret De Quincy
Margaret was born in 1225 in Lincoln, England.  She died at the age of 33 in 1258 in Clerkenwell, England.

 Margaret Joan De Ferrers
Margaret Joan was born in 1238 in Derbyshire, England.  She died in Castle Berkeley, Gloucestershire, England.

 Robert De Ferrers VIII Earl of Derby
Robert De Ferrers VIII Earl of was born in 1239 in Derby, Lincolnshire, England.  He died at the age of 40 in 1279.

 William De Ferrers Earl of Derby
William De Ferrers Earl of was born in 1240 in Groby, Leicestershire, England.  He died at the age of 47 on December 20th, 1287.

 Agnes De Ferrers
Agnes was born in 1245 in Groby, Derbyshire, England.