Edward de FERRERS
Edward de was born in 1387.  He died at the age of 48 on December 17th, 1435.

 Helen de la ROCHE
She died in 1439.

 William de FERRERS
William de was born in 1412 in Chartley, Staffordshire, England.  He died at the age of 38 on June 9th, 1450.