Name Herfast ; Herbastes ; Herfost; Gorm den Herfast; Gorm "The Old" King of Denmark; Herbastus "the Dane" (Seigneur) de Gorm den gamle
Surname de Crépon ; of Arque ; Gorm "The Old" Knudsson
Birth Date c. 955; 975; c. 890; 860; c. 900; 870
Birth Location Crépon, Calvados, Normandie, France or Arque, Seine Inferieure, Normandy, France ;Crépy-En-Laonnois,Aisne,France ; Blauzahn, Germany of Normandy, France, Denmark ;Crépon, Lower-Normandy, France
Death Date 985; 1004; 981 ; c. 981; 940; 958
Death Location Crepon, Calvados, Normandy, France OR Arques, Seine Inferieure, Normandy, France