In all the world, ประเสริฐศิริ (ประเสริฐศิริ 
) is a very rare masculine first name. The first name ประเสริฐศิริ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare male name. More prevalently, ประเสริฐศิริ is the last name as well as the forename.