Surname Ilyasa (Ilyasa 
) , throughout the world, is quite a rare cognomen. The cognomen Ilyasa is characteristic of South-eastern Asia, particularly Indonesia, where it is quite a rare surname, Malaysia, where it is a rare surname, and Singapore. Not in comparison with a country's population, it is the most numerous in Indonesia, Malaysia, and Tanzania. Likewise, Ilyasa is the forename as well as the last name.