He was born in India to
Muhammad Amin Khan Turani. At the close of the reign of the
Emperor Aurangzeb he was able to obtain satisfactory rank and was titled as Qamarudin Khan. In the reign of the Emperor
Furrukhsiyar he was appointed as
Bakshi of Ahadis and later led an expedition against the Sikhs along with Abdus Samad Khan Diler Jang. In the beginning of the reign of the Emperor
Muhammad Shah, (sometime after the killing of
Hussain Ali Khan under his father's direction), he repelled an assault on Imperial troops and showed immense valour, for which he was bestowed a mansab of 6000, the office of second
Bakshi (his father's former appointment which had become vacant upon his resignation) and the position of "
Darogah e Ghusl Khana". At the death of his father, Muhammad Amin Khan, who was then serving as Grand Vizier was replaced by
Nizam al Mulk Qamar-ud-din Asaf Jah I who was summoned to court, Qamar Ud Din Khan was further elevated in rank and granted his father's title of Itimad ud Daula. Later
Asaf Jah found the court atmosphere to be too hedonistic and debauched for his personal liking and subsequently resigned from the office of Grand Vizier. Upon which the office of grand vizier came to Qamar Ud Din Khan. His reign as Grand Vizier was largely un-eventful, and he enjoyed his office with happiness except for some excursions against the Marathas in the Malwa subah. Along with another occasion in which he marched with
Safdar Jang,
Umdat al Mulk and the
Emperor Muhammad Shah against
Ali Mohammad Khan Rohilla. However, upon finding Ali Mohammad Khan to be a suitable check against Safdar Jang whom he despised. Qamar-ud-din Khan helped Ali find employment in Imperial Services and helped his rehabilitation and eventual appointment as governor of Sirhind. A son of his was further engaged to a daughter of Nawab Ali Mohammad Khan. == Death ==