Guillaume de Fiennes
Guillaume was born in 1160.  He died at the age of 81 in 1241 in Wendover, Buckinghamshire.

 Agnes de Dammartin

 Agnes de Fiennes
Agnes was born about 0011.  She died about 0001.

 Maud de Fiennes
Maud was born about 0011.  She died about 0001.

 Enguerrand de Fiennes
Enguerrand was born about 1192.  He died in 1267 in Wendover, Buckinghamshire.