Hij is getrouwd met Beatrice de Walcourt.
Zij zijn getrouwd
Kind(eren):
WINAND van Gronsfeld ). Thierry d’Orjo suggests that Winand was “probablement frère cadet de Philippe de Gronsveld” with whom he is named in sources dated 1145 and 1148, and that they were maybe sons of Giselbert van Gronsveld who was named in 1103: he cites, among other sources, Ryckel who records that “les avoueries d’Olne et de Soiron”, held by Giselbert in the early 12th century, were later held by Thierry de Houffalize[1273]. The family connections appear clear, although the possibility of an intervening generation cannot be excluded considering the chronology of the Walcourt family: for example the marriage of Wéry [II] de Walcourt, brother of Winand’s wife, is dated to [1164/70], which suggests that he and his sister were born in the early 1140s which is late if the sister’s husband was already adult in 1145. Seigneur de Houffalize. ["Theodoricus dominus Hornensis" acknowledged receipt of money from "Arnulphum dominum et avunculum comitem Lossensem" and also holding the castle of Horne from him, by charter dated 1147, witnessed by "...Theodorici d. de Walicuria...et Winandi d. de Altafalesia, militum"[1274].]
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