Tokharistan is a historical name used by Islamic sources in the early Middle Ages to refer to the area which was known as Bactria in Ancient Greek sources. The name appears before Islam in Bactrian as Τοχοαραστανο on the 2nd-century silver dish of Nukunzuk and on two 5th-century Bactrian documents, a name which the Tochari gave to the areas they settled but which was likely limited initially to Bactria's eastern parts.