Last name Smyj (Smyj 
) , around the globe, is a very rare family name. The family name Smyj is characteristic of Poland, where it is a very rare surname, Canada, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, it is the most numerous in Poland, the United States, and Canada. Likewise, Smyj is the forename as well as the last name.