abstract:Mir Muhammed Jafar Ali Khan Bahadur, commonly known as Mir Jafar, second son of Sayyid Ahmad Najafi, (1691–February 5, 1765) was the Nawab of Bengal (Bengal, Bihar and Orissa). He was the first Nawab of the Najafi dynasty after deceiving Nawab Siraj-Ud-Daulah.