Piruz (Narsi) son of Jamasp - d.642 Sasanian prince father of Gil Gavbara

In ca. 642, Piruz died, and was succeeded by Gil Gavbara as the ruler of Gilan. Gil Gavbara was later given all of Tabaristan, which led to the formal conferment of the titles of Gil-Gilan ("ruler of Gilan") and Padashwargarshah ("Shah of Patashwargar", the old name of Tabaristan's mountains), to Gil Gavbara's son Dabuya, by the last Sasanian shah, Yazdegerd III.

Not much is known about Jamasp himself, and his name occurs only in conjunction with his short interregnum. Byzantine accounts of the episode (Joshua the Stylite and Procopius) mention that Kavadh was deposed because of his determination to spread a new "religion" that preached redistribution of property. Following Kavadh's deposition and subsequent imprisonment, Jamasp was elected to succeed his brother.

Later Islamic sources such as Tabari and Dinawari inform us that Jamasp was a good and kind king who reduced taxes in order to relieve the peasants and the poor. He was also a proper adherent of the Mazdean religion (Zoroastrianism), diversions from which had cost Kavadh his throne and freedom.

The sources also tell us that upon the return of Kavadh at the head of a large army given to him by the Hephthalite king, Jamasp loyally stepped down from his position and restored the throne to his brother. Jamasp then went to Persian Armenia, where he defeated the Khazars, conquered some of their territory, and married a woman from Armenia, who bore him a son named Narsi

After Jamasp's death in 530/540, his son Narsi, who had a son named Piruz, expanded the domains of his family, which included Gilan.

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Not much is known about Jamasp himself, and his name occurs only in conjunction with his short interregnum. Byzantine accounts of the episode (Joshua the Stylite and Procopius) mention that Kavadh was deposed because of his determination to spread a new "religion" that preached redistribution of property. Following Kavadh's deposition and subsequent imprisonment, Jamasp was elected to succeed his brother.

Later Islamic sources such as Tabari and Dinawari inform us that Jamasp was a good and kind king who reduced taxes in order to relieve the peasants and the poor. He was also a proper adherent of the Mazdean religion (Zoroastrianism), diversions from which had cost Kavadh his throne and freedom.

The sources also tell us that upon the return of Kavadh at the head of a large army given to him by the Hephthalite king, Jamasp loyally stepped down from his position and restored the throne to his brother. Jamasp then went to Persian Armenia, where he defeated the Khazars, conquered some of their territory, and married a woman from Armenia, who bore him a son named Narsi.

his name is also Firuz - [.. The Dabuyids were descended from a brother of Sasanian shah Kavadh I. His grandson Firuz conquered Guilan and Firuz's grand son Gil, surnamed Gavbara, then extended the family's rule over Tabaristan as well...]