Family name Siduk (Siduk 
) , globally, is a rare surname. The family name Siduk is characteristic of South-eastern Asia, particularly Malaysia, where it is a very rare surname, Indonesia, and Philippines, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Indonesia, Malaysia, and India. Very seldom, Siduk is the forename as well as the last name.