Last name Слейт (Slate 
, Слейт 
) , around the world, is quite a common family name. The family name Слейт is characteristic of the United States, where it is quite a rare surname, Nicaragua, and Romania, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in the United States, the United Kingdom, and Canada. Much less frequently, Слейт is the forename as well as the last name.