A more recent interpretation of the sources by P. Pourshariati, however, supports that Farrukhan was the one who actually established the family's rule over Tabaristan, sometime in the 670s.
En nyere fortolkning af kilderne af P. Pourshariati, understøtter dog, at Farrukhan var den, der faktisk etableret familiens styrer over Tabaristan, engang i 670erne.