Khawaja Abid Khan Siddiqi, or Nawab Khawaja Abid Siddiqi, better known as Kilich Khan, was a Nawab and military general under Mughal Emperor Aurangzeb. He was a loyal general of the Mughal Empire. He was the father of the Mughal general Ghazi ud-Din Khan Feroze Jung I and the grandfather of Mir Qamar-ud-din Siddiqi, Asaf Jah I. Kilich Khan was a descendant of Abu Bakr, first Rashidun caliph.

Nizam of Hyderabad was the title of the ruler of Hyderabad State. Nizam is a shortened form of Niẓām ul-Mulk, which means Administrator of the Realm, and was the title bestowed upon Asaf Jah I when he was appointed Viceroy of the Deccan by the Mughal Emperor Farrukhsiyar. In addition to being the Mughal Viceroy (Naib) of the Deccan, Asaf Jah I was also the premier courtier of the Mughal Empire until 1724, when he established the independent monarchy of Hyderabad and adopted the title "Nizam of Hyderabad".