The term Sayyid brothers refers to Syed Hassan Ali Khan Barha (1666 – 12 October 1722 CE) and Syed Hussain Ali Khan Barha (1668 – 9 October 1720 CE), who were powerful Mughal Army generals of the Mughal Empire during the early 18th century.
They claimed to belong to the family of Sayyids or the descendants of the Prophet Muhammad through his daughter Fatima and son-in-law and cousin Ali who belonged to the Banu Hashim Clan of the Quraish Tribe.
The Sayyid Brothers became highly influential in the Mughal Court after Aurangzeb's death and became kingmakers during the anarchy following the death of emperor Aurangzeb in 1707. They created and dethroned Mughal Emperors at their will during the 1710s. Aurangzeb's son Bahadur Shah I defeated his brothers to capture the throne with the help of Sayyid Brothers and Chin Quilich Khan (Nizam-ul-Mulk), another influential administrator in the Mughal court. Bahadur Shah I died in 1712, and his successor Jahandar Shah was assassinated on the orders of the Sayyid Brothers.
In 1713, Jahandar's nephew Farrukhsiyar (r. 1713–1719) became the emperor with the brothers' help. His reign marked the ascendancy of the brothers, who monopolised state power and reduced the Emperor to a figurehead. The brothers conspired to send Nizam-ul-Mulk to Deccan, away from the Mughal Court, to reduce his influence. In 1719, the Brothers blinded, deposed and murdered Farrukhsiyar. They then arranged for his first cousin, Rafi ud-Darajat, to be the next ruler in February 1719. When Rafi ud-Darajat died of lung disease in June, they made his elder brother, Rafi ud-Daulah (Shah Jahan II), ruler. After Rafi ud-Daulah also died of lung disease in September 1719, Muhammad Shah (r. 1719–1748) ascended the throne at the age of seventeen with the Sayyid Brothers as his regents until 1720.