This person a well -known trumpet player was known by the satchmo?

The person you are referring to is Louis Armstrong, a legendary American jazz trumpeter, singer, and bandleader. He was popularly known by the nickname "Satchmo," a shortened version of "Satchelmouth," which referred to his wide mouth and distinct embouchure. Armstrong was one of the most influential figures in jazz history and is widely considered to be one of the greatest trumpet players of all time.