Amīr Khusrow (1253–1325) was a legendary Indo-Persian poet and musician credited with inventing qawwali , a form of Sufi devotional music. He is celebrated as one of India's greatest Persian-language poets.
As political structures evolved in the Arabic-speaking world, the title shifted from a purely military designation to a civilian one. It became a title for governors, rulers of smaller states, or high-ranking officials. In modern Arabic, it is frequently used as a synonym for "Prince," often given to the sons of a monarch.
The word (also spelled Emir ) is derived from the Arabic root a-m-r , which translates to "command". Historically, the term was used to describe a "commander-in-chief" or a military leader.