Family name Melguy (Melguy 
, Мельгуй 
) , worldwide, is a rare last name. The last name Melguy is characteristic of Belarus, where it is quite a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Not in comparison with a country's population, it is the most numerous in Belarus, Russia, and the United States. Also, Melguy is the forename as well as the last name.