Eustache du Roeulx, IV, seigneur du Roeulx et de Morlanwelz

EUSTACHE [IV] "Campulus" du Rœulx, son of EUSTACHE [III] Seigneur du Rœulx & his wife Marie de Tournai ([1190/1205]-after Mar 1274). The late 13th century genealogy by Balduinus de Avennis names “filium unum [...Eustachius] et filiam unam” as the children of “Eustachius dictus Kanivet” and his wife “filiam Balduini de Mortania castellani Tornacensis”[339]. Seigneur du Rœulx. “Eustache seigneur de Rœulx” confirmed the foundation of a chapel at Sart by “Gilles chevalier de Sart” by charter dated 1234[340]. Under a codicil dated Aug 1242, “Arnould d’Audenarde” appointed as his executors “Eustache de Rœux chevalier son cousin, Bauduin de Mervenghien, Alix sa femme, Robert de Saint-Jacques et Eustache de Gand, frère cordeliers”[341]. The family relationship between Eustache [IV] and Arnoud [IV] Heer van Oudenarde was that Richilde de Tournai, mother of Arnoud [IV], was the paternal aunt of Eustache [IV]’s mother --- de Tournai. It has not proved possible to assess with any certainty the date of death of Eustache [IV]. His son was named in sources as “seigneur de Trazegnies”, without reference to “seigneur du Rœulx”, until Mar 1274. It is a reasonable assumption therefore that his father Eustache [IV] was still alive at that date and continued to hold the seigneurie du Rœulx.

m MARIE de Trith, daughter and heiress of GILLES de Trith {Trith St Léger, Nord} & his wife ---. The late 13th century genealogy by Balduinus de Avennis records that “Eustachius”, son of “Eustachius dictus Kanivet” and his wife “filiam Balduini de Mortania castellani Tornacensis”, married “filiam domini Ægidii de Tryt, sororem domini Theodorici de Bevre ex parte matris”[342]. It is difficult to identify with certainty the relevant “van Beveren” (see the document FLANDERS NOBILITY) to whom the wife of Gilles de Trith was married as her first/second husband.

Eustache [IV] & his wife had [eight] children:
https://fmg.ac/Projects/MedLands/HAINAUT.htm#EustacheIVRoeulxdied1282B