Who gave the title of Sher Khan to Farid and Why?

Sher Shah Suri or Sher Khan was the founder of Sur dynasty in India. In 1522 he joined the service of Bahar Khan, governor of Bihar. He was given the title of Sher Khan by Bahar Khan, because of the courage and bravery showed by him in killing a tiger single-handedly, without fear. He was a very capable administrator and is remembered for his rule and the reforms he introduced. His supervision was very efficient but a bit strict. He continued his administrative as well as military activities concurrently. Sher Khan's other name is Farid Khan.