Last name Mungay (Mungay 
) , all around the world, is a rare family name. The last name Mungay is habitual in Uruguay, where it is quite a rare surname, Bulgaria, where it is a rare surname, and Tanzania, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Uruguay, Germany, and Tanzania. More prevalently, Mungay is the forename as well as the last name.