William de MONTAGU
William de was born in Casssington, Oxfordshire, England.  He died in Windsor Castle, Berkshire, England.

 Katherine de GRANDISON
Katherine de was born about 1304 in AShford, Hertfordshire, England.  She died on November 23rd, 1349 in Bisham, Berkshire, England.

 Phillipa DE MONTAGU
Phillipa DE was born about 1332 in Salisbury, Wiltshire, England.