Baduspanid

The Baduspanids were an Iranian dynasty that ruled Ruyan, later Rustamdar, in Tabaristan. In 665 Baduspan I, son of Gil Gavbara, was enfeoffed with Ruyan, founding a line that held the region for 933 years. After the Dabuyid fall in 760, the Baduspanids kept their highland autonomy as tributary princes, and their title of ustandar gave Rustamdar its name.

They weathered a Bavandid occupation between 1190 and 1209 and, in the fourteenth century, ruled from Kojur under Jalal al-Dawla Iskandar, who was on the throne in 1337. The Mar'ashis overran Rustamdar in 1381 and held it until Timur's conquest of Mazandaran in 1393; Kayumarth I restored the realm in 1405.

On his death in 1453 the kingdom split into the Kojur and Nur branches, which ruled separately until the Safavid shah Abbas the Great deposed both, extinguishing the dynasty in 1598.