Her parentage and marriage are indicated by an enquiry in 1267 which adjudged property of “Philippus olim comes Bolonie et...Matildis” to “Matheus comes Domni-Martini, domini Guillelmus de Fienes, Baldoinus de Fienes, Michael de Fienes, Ingerannus de Pinquegniaco et Renaudus de Pinquegniaco, heredes comitisse Matildis Bolonie”.
“Willelmus filius Ingelrami dominus de Fielnes” donated property to Andres, with the consent of "uxore mea Agnete et filio meo Ingelramno", by charter dated 1 Jan 1203 witnessed by "Radulfo de Fielnes patruo meo…Joanne de Tingri…". 2
10 Apr 1244, Westminster
Order to the sheriff of Somerset to hand the manor of Martock with appurtenances, formerly of Enguerrand de Fiennes, which he took into the king’s hand by reason of an inquisition into the lands of the Normans and of aliens, to John Reeve and William Freuwar’ to keep until Trinity, in order to do with the issues of the same manor that which the king has enjoined upon them. He is to permit Agnes, mother of the same Enguerrand to have free administration of all chattels and property, namely both of corn and of other things, formerly of the aforesaid Enguerrand in the same manor, and, moreover, of the rents of the same manor from Easter term past.
Calendar of Fine Rolls, 28 Hen. III, 164