Nawab Sir Muhammad Khan-i-Zaman Khan KCIE (died 1936), also known as Khan-i-zaman Khan, was the ruling Nawab of the princely state of Amb from 1907 until his death in 1936.
The son of Nawab Muhammad Akram Khan, whom he succeeded in 1907, the Nawab helped the British in carrying out several of the later Black Mountain expeditions to Kala Dhaka/Tor Ghar. In 1926 he sent a force which fought with the Wali of Swat at Chamla.
As well as being a knight commander of the Order of the Indian Empire, the Nawab held the rank of Honorary Major in the Indian Army. From his time onwards, the title of 'Nawab' was used in perpetuity by him and his descendants. He died of syphilis at Amb in 1936.