William "Fort" De Vivonne
William "Fort" De was born about 1218 in Of, , Albermarle, Scotland.  He died on May 22nd, 1259.

 Maud (Matilda) De Ferrers
Maud (Matilda) De was born about 1223 in Of, , Derbyshire, England.

 Joan De Vivonne
Joan De was born about 1233 in , Hertfordshire, England.  She died in 1314.

 Cecilia (Cicely) De Vivonne
Cecilia (Cicely) De was born about 1253 in Of, Hatch, Somersetshire, England.  She died on January 10th, 1320 in , Stoke-Under-Hamden, Somersetshire, England.  She was buried in Fort In Poitore.