William (De Fortibus) De Vivonia
William (De Fortibus) was born in 1225 in Chewton, Somerset, England.¹   He died at the age of 34 on May 22nd, 1259 in de wells, Somerset, England.¹ 

 Maud De Ferrers
Maud was born in 1228 in , Derbyshire, , England.²   She died at the age of 71 on March 12th, 1299 in Chewton, Somerset, , England.² 

 Cecilia De Vivonne
Cecilia was born in 1253 in Hatch, Somerset, , England.³   She died at the age of 67 on January 10th, 1320 in Stoke Under Hamden, Somerset, , England.³