Surname Hilaya (Hilaya 
) , around the globe, is a rare last name. The surname Hilaya is habitual in Bolivia, where it is quite a rare surname, Israel, where it is a rare surname, and Chile, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Bolivia, Israel, and Brazil. Very seldom, Hilaya is the forename as well as the last name.