Al-Marzuban
Al-Marzuban , was the thirteenth ruler of the Bavand dynasty from 979 to 986.
He was the son and successor of Rustam II.
In some sources, his name was changed to Rustam ibn al-Marzuban, which caused confusion among the historians, and made them think that they were two people.
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Shahriyar III
Shahriyar III( Persian: شهریار), was the sixteenth ruler of the Bavand dynasty from 986 to 987, and briefly in 998 after a short disruption during his reign.
He was the nephew and successor of Sharwin III.
Shahriyar III was the son of a certain Bavandid prince named Dara.
In 986, after the death of the Bavandid ruler Rustam II, his son al- Marzuban ascended the Bavandid throne.
There have been several confusions about the reign of the Bavandid kings after the death of Rustam II.
In 986, al- Marzuban is no longer mentioned as the ruler of the Bavand dynasty, and a certain Sharwin III is instead mentioned as the ruler of the dynasty.
Shahriyar III is later mentioned as the ruler of the Bavand dynasty in the following year.
Al- Marzuban is then once again mentioned in sources, as having deposed Shahriyar III, and restored himself as the ruler of the Bavand dynasty.
In 998, Shahriyar III returned to Tabaristan with Ziyarid aid, and captured Shahriyarkuh from al- Marzuban.
However, al- Marzuban, with Buyid aid, managed to quickly repel him from the city.
Shahriyar III shortly made another counter- attack, and defeated al- Marzuban.
Shahriyar III then ascended the Bavandid throne, and declared independence from Ziyarid rule.
al- Marzuban used this opportunity to become the vassal of the Ziyarids, and regain his throne.
Shahriyar III then fled to Ray, where he died in 1000.
Rustam II
Rustam II , was the twelfth ruler of the Bavand dynasty from 964 to 979.
He was the brother and successor of Shahriyar II.
Rustam was the son of Sharwin II.
In 964, Shahriyar was deposed because of his pro-Ziyarid policies in favor of his pro-Buyid brother Rustam.
Rustam was the first Bavand ruler who embraced Shia Islam.
Shahriyar later tried to reclaim the Bavand throne by invading Tabaristan with a Samanid army in 968, but to no avail.
Rustam died in 979, and was succeeded by his son Al-Marzuban.
Sharwin III
Sharwin III, was the fourteenth ruler of the Bavand dynasty briefly in 986.
He was the brother and successor of al- Marzuban.
Sharwin was the son of Rustam II.
In 986, after the death of Rustam II, Sharwin's brother al- Marzuban ascended the Bavandid throne.
There have been several confusions about the reign of the Bavandid kings after the death of Rustam II.
In 986, al- Marzuban is no longer mentioned as the ruler of the Bavand dynasty, and Sharwin III is instead mentioned as the ruler of the dynasty.
A certain Shahriyar III is later mentioned as the ruler of the Bavand dynasty in the following year.
Nothing more is known about Sharwin III.
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Question: Who is Al-Marzuban's paternal grandfather?
Answer: Sharwin II