William III de Ferrers , 5th Earl of Derby
William III de was born about 1193 in Derby, Derbyshire, England.  He died before March 28th, 1254 in Evington, Leicestershire, England.  He was buried on March 31st, 1254 in Sheriff of Lancaster.

 Sibyl Marshal
Sibyl was born about 1191 in Pembroke, Pembrokeshire, Wales.  She died before 1238.

 Eleanor de Ferrers
Eleanor de was born about 1232 in Derby, Derbyshire, England.  She died before October 26th, 1274 in Leeds Priory, Kent, England.