She is married to Wijnand van Gronsveld.
They got married
Child(ren):
m --- de Walcourt, daughter of THIERRY [I] Seigneur de Walcourt & his wife Mathilde de la Roche. The Chronicle of Alberic de Trois-Fontaines names "Werricum de Rupeforti et matrem Theoderici de Hufalize, cuius filius Henricus de Hufalize" as children of Mathilde de la Roche and her first husband "Theoderico de Walecurt"[1275]. The Chronicon Hanonense names "Beatrix" as daughter of "Henri…quens de Durbuis" and her husband "Winant le signour de Hufalise"[1276], although according to Europäische Stammtafeln[1277] the wife of Winand van Gronsfeld Seigneur de Houffalize was Beatrix de Walcourt, daughter of Thierry [I] de Walcourt & his wife Mathilde de Laroche, who was this Beatrix's sister.
Winand & his wife had one child:
THIERRY [I] de Houffalize (-[Oct/Nov] 1235)
https://fmg.ac/Projects/MedLands/LUXEMBOURG.htm#WinandGronsfeldHouffalize