In c. 913, Lorestan was split up into realms; Lur-i Buzurg (Greater Lur) and Lur-i Kuchak (Lesser Lur). The Bakhtiyaris are first attested in history in the early 15th-century. In 1413, the arrival of several Bakhtiyari clans such as the Astarki, Kutwand, Raki, Janaki and Zallaki are mentioned by the Timurid-era historian Mu’in al-Din Natanzi. Under the Safavids, Lur-i Kuchak became known as Luristan-i Fili, while Lur-i Buzurg (extending from Isfahan to Kohgiluyeh and from Shushtar to Behbahan) became Bakhtiyari land.