GODEFROI de Namur, son of ALBERT III Comte de Namur & his wife Ida von Sachsen (-19 Aug 1139). The Chronicon Huberti names "Godefrido filio Alberti comitis Namucensis"[86]. The Genealogica comitum Buloniensium names "Godefridum et Henricum comitem de Rupe" sons of "Albertus de Namurco", specifying that Godefroi "caruit liberis"[87]. The Chronicle of Alberic de Trois-Fontaines names "Godefridum comitem de Namuco et comitem Albertum de Rupe et sorores eorum" as children of "Albertus comes senior Namucensis"[88]. Comte de Château-Porcien 1097, by right of his first wife. He succeeded his father in 1102 as GODEFROI Comte de Namur. He founded Floreffe in 1121. "Ducem Godefridum seniorem eiusque filium…Godefridum iuniorem" donated property "in parochia Braniensi…Dudinsart" to Gembloux by charter dated 1131, witnessed by "Godefridus comes Namucensis eiusque filius Henricus, Henricus minor filius ipsius ducis, Wilhelmus advocatus de Namuco eiusque frater Anselmus…"[89].
m firstly ([1087], divorced [1104]) SIBYLLE de Porcien, daughter of ROGER Comte de Château-Porcien & his wife Ermengarde ---. The Chronicon Huberti names "filiam suo [=Rogerus Porcensium comes] Sibillam" wife of "Godefrido filio Alberti comitis Namucensis"[90]. The Chronicle of Alberic de Trois-Fontaines names "Sibiliam filiam comitis Rogerii Porcensis" as wife of "comes Godefridus de Namuco"[91]. She was seduced by Enguerrand de Boves Comte d´Amiens, Sire de Coucy, and fled her husband before giving birth to an illegitimate child[92]. Guibert de Nogent records that "Ingelrannus" abducted "filia…Rogeri comitis Porcensis", wife of "Namurensi…comiti Godefrido"[93].
m secondly ([1109]) as her second husband, ERMENSENDE de Luxembourg, widow of ALBERT [II] Graf von Dagsburg, daughter of CONRAD I Comte de Luxembourg & his [second] wife Clémence --- (-26 Jun 1141). The Chronicle of Alberic de Trois-Fontaines names "comitem Guilelmum de Luscelenburg…et Ermensendem…et Mathildem" as children of "Conrado comiti de Luscelenburch" and his wife Ermensendis, specifying that Ermesinde was wife of "Namucensem…comitis Godefridi"[94]. However, Ermensende´s correct parentage is stated in the charter dated 17 Jun 1129 under which Meginher Archbishop of Trier confirmed the foundation of Kloster Schiffenberg by "Clementia…comitissa" with the consent of "filii sui Willehelmi et filie Irmesindis"[95]. The Chronicle of Alberic de Trois-Fontaines names "Ermensendem sororem comitis Guilelmi de Luscelenburg" as second wife of "comes Godefridus de Namuco"[96]. "Ermensendis comitissa Namucensis" confirmed the prior donation of property to the church of Verdun Sainte-Vanne by "senioris mei comitis Alberti" by charter dated to [1124], subscribed by "domni mei Godefridi comitis et filii mei Henrici comitis, Hugonis filii Folmari comitis, Everardi filii Aiulfi comitis"[97]. She succeeded in 1136 as Ctss de Luxembourg à Longwy. "Comitissa de Musal Ermensendis cum viro suo Namucensi comite Godefrido" donated property to Flône, at the request of "Guntranni et Gisle uxoris eius", by charter dated 1137[98]. The necrology of Verdun Saint-Vanne records the death "VIII Kal Jun" of "Ermensendis comitissa Namucensis qui cum viro suo…comite Alberto cellam Montis Sancti Martini…confirmavit"[99].