GUILLAUME de Béthune, son of GUILLAUME [III] de Béthune & his wife Mathilde van Dendermonde (-12 Jan 1243). "Willelmus de Bethunia et uxor eius Elisabeth de Ponte Roardi" donated property to the abbey of Ravensberghe by charter dated early Dec 1228[503]. Heer van Molembeek. "Williermus de Bethunia dominus de Molembeka et Elisabeth domina de Ponte-Rohardi uxor mea" founded the abbey of Pont-Rohard, with the consent of "Ægidii filii nostri primogeniti", by charter dated Apr 1240[504]. The necrology of Pont-Rohard records the death "II Id Jan" in 1243 of "Wilelmi de Bethunia quondam domini de Ponte-Rohardi nec non…uxoris suæ, fundatorum ecclesiæ"[505].
mELISABETH Dame de Pont-Rohard, daughter of --- (-19 Jan ----). "Willelmus de Bethunia et uxor eius Elisabeth de Ponte Roardi" donated property to the abbey of Ravensberghe by charter dated early Dec 1228[506]. "Williermus de Bethunia dominus de Molembeka et Elisabeth domina de Ponte-Rohardi uxor mea" founded the abbey of Pont-Rohard, with the consent of "Ægidii filii nostri primogeniti", by charter dated Apr 1240[507]. The necrology of Pont-Rohard records the death "XIV Kal Feb" of "Elisabeth dominæ de Ponte-Rohardi"[508].
Guillaume & his wife had four children