MATHILDE de La Roche . The Genealogica comitum Buloniensium names "Mathildis" daughter of "Henricum comitem de Rupe"[156]. The Chronicon Hanonense names "Mehaut" as daughter of "Henri…quens de Durbuis", her first husband "signour de Wallecourt Weri de Walecourt" and her second husband "Nicholas d'Avesnes"[157]. The Chronicon Hanoniense names "Mathildem filiam Henrici comitis de Roche in Ardenna" as wife of "Nicholaus filius [Walteri…de Avethnes]"[158]. The Chronicle of Alberic de Trois-Fontaines names (in order) "Fredericus archidyaconus Sancti Lamberti Leodiensis, qui postea factus archiepiscopus de Tyre, et soror eius Mathildis" as children of "Albertus de Rupe", specifying that Mathilde married firstly "Theoderico de Walecurt" by whom she was mother of "Werricum de Rupeforti et matrem Theoderici de Hufalize, cuius filius Henricus de Hufalize", and secondly "Nicolao de Avenes"[159]. The late 13th century genealogy by Balduinus de Avennis records that "filius eius Nicolaus Plukellus" married "Machtildem filiam Henrici comitis de Rupe in Ardenna", whose first husband was "domini de Walecourt"[160]. m firstlyTHIERRY de Walcourt, son of --- (-[1147/48]). The Chronicon Hanoniensenames "Widricode Walecourt" as brother of "Iacobus…de Avethnis"[161]. In a later passage, the same source names "Widricum de Wallecort etfilias multas" as children of "Mathildis [filiis Henrici comitis de Roche]" & her first husband[162]. m secondly (before 1150) NICOLAS d'Oisy Seigneur d'Avesnes, son of WAUTIER [I] d'Oisy & his wife Ade [Ide] de Mortagne (-[1169/71]).