William de Ferrers
William was born in 1225 in Bere Ferrers, Devonshire, England.  He died about 1279.

 Isolda de Cardinan
Isolda was born before 1238.  She died after 1252.

 Joan de Ferrers
Joan was born about 1252 in Ifrancombe, Devonshire or Cornwall, England.  She died after 1280.

 Reginald de Ferrers
He died after 1280.