Family name Летт (Lett 
, Летт 
) , in the entire world, is a common last name. The last name Летт is characteristic of Grenada, where it is a common surname, Myanmar, where it is quite a common surname, and Trinidad and Tobago, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Myanmar, the United States, and France. Very seldom, Летт is the forename as well as the last name.