The Chronicon Huberti names "Godefrido filio Alberti comitis Namucensis". The Genealogica comitum Buloniensium names "Godefridum et Henricum comitem de Rupe" sons of "Albertus de Namurco", specifying that Godefroi "caruit liberis". 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".
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. "Godefridus comes Namurcensis et Ermensendis comitissa" founded the abbey of Floreffe, with the consent of "Adelberto, Henrico, Clementia, Beatrice, Adelaide", by charter dated 27 Nov 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…".
The necrology of Floreffe records the death "XIV Kal Sep" in 1139 of "domini Godefridi comitis Namurcensis fundatoris hujus ecclesie". 1