William de Fortibus VIVONIA & Maud (Matilda) de FERRERS 
They had a daughter named Joan de.
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Personal Details
William de Fortibus VIVONIA
William de Fortibus was born about 1225 in Chewton, Somersetshire, England. He died before May 22nd, 1259 in Chewton, Somersetshire, England.
Maud (Matilda) de FERRERS
Maud (Matilda) de was born about 1230 in England. She died on March 12th, 1298 in Chewton, Somersetshire, England.
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Children
Joan de VIVONIA
Joan de was born in 1251 in Chewton, Somersetshire, England. She died at the age of 63 on June 1st, 1314 in England.