The royal house of Pontus claimed to be descended from the cream of the old Persian nobility, the Seven Families, and to have received its lands as the gift of Darius I. The claim is first attested by Polybius, and it became common currency in the reign of Mithridates Eupator. Since Théodore Reinach wrote his magisterial history of the Pontic kingdom, the royal pretensions of the regime have been dismissed as apocryphal.