EUSTACHE [II] de Fiennes, son of CONON de Fiennes & his wife --- (-after 1141). "Cononis de Fieules, Eustacii et Rogerii filiorum eius…" subscribed the charter dated Jul 1112 under which "Eustacius Bolonie comes" confirmed the possessions of the abbey of Samer[646]. "Cono de Finlleiz, Eustacius et Rogerius filius eius…" subscribed the charter dated 16 Jul 1113 under which "Eustachius junior…Boloniensium comes" confirmed the possessions of the abbey of Samer[647]. "…Eustachius de Fielnes, Willelmus et Rogerus fratres sui…" subscribed the charter dated 1141 (presumably misdated because of the donors´ titles) under which "Stephanus comes Bolonie et Morethonii et Mathildis comitissa" confirmed the possessions of the abbey of Samer[648]. The Historia Comitum Ghisnensium records that "Eustacius senex de Fielnis" founded "ecclesiam de Bello-loco"[649].
m ---. The name of Eustache´s wife is not known.
Eustache [II] & his wife had four children