Surname Симая (Shimaya 
, Симая 
) , in the world, is a very rare last name. The cognomen Симая is characteristic of Israel, where it is a very rare surname, Thailand, where it is an extremely rare surname, and Brazil. Not in comparison with a country's population, it is the most numerous in Brazil, the United States, and Thailand. More frequently, Симая is the forename as well as the last name.