The dynasty which ruled the khānate of Bukhara during the greater part of the seventeenth and eighteenth centuries claimed descent from Chingiz Khān's son Jochi, as did the Shaybānids of the preceding dynasty. It is known as Ashtarkhānid, to recall the place of origin of the family, viz. Astrakhan. More often it is referred to as Jānid, after Jānāī Muḥammad Khān, who is considered by some as the first ruler of the dynasty. But it will be seen that there is no clear basis for such an assumption, and that in fact his father and his eldest son were between them the founders of the dynasty