Muslim conquest of the Levant
The Afrin valley was part of Roman Syria until the Muslim conquest of the Levant in 637. The Afrin river was known as "Oinoparas" (in Greek Οινοπάρας) in the Seleucid era, in the Roman era the name became "Ufrenus", whence the Arab vernacular "ʿAfrīn, ʿIfrīn", adopted as Kurdish "Efrîn".