Lancelot's title was 'SIR, ' which is a three-letter word. SIR is a title of honor given to a man who has been knighted by a monarch or other political leader for service to the Crown or country. In the Arthurian legend, SIR Lancelot was one of the Knights of the Round Table and a close friend of King Arthur. He was renowned for his courage and skill in battle, and was known as the greatest knight in the kingdom.