WILLIAM (Earl de DERBY) de FERRERS
WILLIAM (Earl de DERBY) was born about 1200 in Derbyshire, England.¹   He died in Evington, Leicestershire, England.¹ 

 MARGARET de QUINCY
MARGARET was born in 1240.¹   She died at the age of 40 in 1280.¹ 

 SIBILL de FERRERS
SIBILL was born in 1215.¹ 

 ROBERT (Sir) EARL de DERBY de FERRERS
ROBERT (Sir) EARL de DERBY was born about 1239 in Of Chartley.¹   He died in 1279.¹ 

 AGNES de FERRERS
AGNES was born in 1244 in Derby, Derbyshire, England.¹ 

 JOAN de FERRERS
¹ 

 WILLIAM (Earl) de FERRERS
He died in 1288.¹