The De Rebus Treverensibus sæculi VIII-X Libellus names two brothers "Gerardus et Meffridus". Regino records that in 897 "Stephanus, Odacar, Gerardus et Matfridus comites" had their honours confiscated, and the reconciliation of "Stephanus, Gerhardus et Matfridus" with King Zwentibold soon after. Regino names "Richarium, fratrem Gerhardi et Mathfridi".
Graf [von Metz]. Regino records that "Chuonradus comes" sent "filium suum Chuonradum" against "Gerardum et fratrem eius Matfridum" in 906. Charles III "le Simple" King of the West Franks restored Kloster Susteren to the abbey of Prüm by charter dated 19 Jan 916 which names "fidelium nostrorum…Widricus comes palatii, Richuuinus comes, Gislebertus, Matfridus, Beringerius comites, Theodericus comes, Reinherus comes, Erleboldus". A document dated 7 Nov 921 recording a meeting between Charles III "le Simple" King of France and Heinrich I King of Germany names "Matfredus, Erkengerus, Hagano, Boso, Waltherus, Isaac, Ragenberus, Theodricus, Adalardus, Adelelmus" as representatives of the former. "Bernacrus…et uxor mea Eva necnon et filia nostra Albuera" donated property "Radinga in pago Metensi in comitatu Matfridi" to St Maximin, supported by "Giselbertum comitem…atque abbatis", by charter dated 926.
The Liber Memorialis of Remiremont records the death "XIV Kal Sep" of "Matfridus". 1
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