Louis Armstrong is one of the most well-known jazz musicians in history, so it's no surprise that he has a number of synonyms and alternate names. Some of the most common include "Satchmo," short for "Satchelmouth" due to his large mouth and trademark trumpet playing style. He's also often called "Pops" in reference to his fatherly presence within jazz culture, and "Ambassador Satch" due to his extensive touring and performing around the world. Other potential nicknames for Armstrong could include "The King of Jazz" or simply "Louis," as he was an icon in his own right and a major influence on the genre as a whole.