 Marcian was a member of several Roman imperial families.His father was Procopius Anthemius, Western Roman Emperor between 467 and 472, who descended from Procopius, usurper in 365-366 against Emperor Valens and relative of Emperor Julian's (360-363).Marcian's mother was Marcia Euphemia, daughter of Marcian (Eastern Roman Emperor in 450-457) with an unknown woman.