Khusrau Firuz was a

Justanid The Justanids or Jostanids ( fa, جستانیان) were an Iranian Zaydi Shia dynasty that ruled a part of Daylam (the mountainous district of Gilan) from 791 to the late 11th century. History The Justanids appear as kings of Daylam at the e ...

king who ruled briefly in 919. He was the brother and successor of

Ali of Dailam ʿAlī ibn Abī Ṭālib ( ar, عَلِيّ بْن أَبِي طَالِب; 600 – 661 CE) was the last of four Rightly Guided Caliphs to rule Islam (r. 656 – 661) immediately after the death of Muhammad, and he was the first Shia Imam. ...

. Before becoming the ruler of the Justanids, Khusrau Firuz aided his brother Ali in murdering their brother

Justan III Justan III was the sixth king of the Justanid dynasty, ruling from 865 to 919. He was the brother and successor of Khurshid of Dailam. Biography Justan is first mentioned in 865, when he was placed on the Justanid throne by his suzerain, the A ...

. Ali then crowned himself as the new ruler of the Justanids, but was shortly killed by the

Sallarid The Sallarid dynasty ( fa, سالاریان), (also known as the Musafirids or Langarids) was a Muslim dynasty, of Daylami origin, which ruled in Tarom, Samiran, Daylam, Gilan and subsequently Azerbaijan, Arran, and some districts in Eastern Arm ...

ruler

Muhammad bin Musafir Muhammad bin Musafir ( fa, محمد بن مسافر) (died before 953) was the Sallarid ruler of Tarum in modern northwest Iran (before 916–941) and Iranian Azerbaijan (949). He was the son of Musafir, and his original name seems to have bee ...

, who was Justan's son-in-law. Khusrau Firuz then succeeded him as the ruler of the Justanids, but was also killed by Muhammad bin Musafir. Khusrau Firuz was then succeeded by his son

Siyahchashm Siyahchashm (Persian/Daylami; ''Siyāhçašm'', literally "black eye"), also known by his ''laqab'' of Mahdi, was ruler of the Justanids from 919 to 928. He was the son and successor of Khusrau Firuz. Siyahchashm's father Khusrau Firuz was killed ...

Sources

* 919 deaths 10th-century Iranian people Justanids Year of birth unknown {{iran-royal-stub