William I de Fiennes, Sheriff of Somerset was born circa 1160 to Enguerrand I de Fiennes (1128-1189) and Sybille de Tingry (c1140-aft1223) and died circa 1240 of unspecified causes. Notable ancestors include Charlemagne (747-814), Alfred the Great (849-899). Ancestors are from France, the United Kingdom, Belgium, Germany.


Offspring of William I Fiennes and Agnes de Dammartin (c1166-)
Name Birth Death Joined with
daughter de Fiennes (c1188-?)
Baldwin de Fiennes (c1190-?)
William de Fiennes (c1200-?)
Enguerrand II de Fiennes (c1210-1265) 1210 1265 Isabelle de Conde (c1214-)

Mahaut de Fiennes (c1210-aft1244) 1210 1244 Baudouin III de Guînes (1198-1244)


Footnotes (including sources)

‡ General

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