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Last name Widjaya (Widjaya ) , all around the world, is a common cognomen. The cognomen Widjaya is characteristic of Indonesia, where it is quite a common surname, Singapore, where it is quite a rare surname, and Australia, where it is a rare surname. Not in comparison with a country's population, it is commonest in Indonesia, Australia, and Malaysia. Much less frequently, Widjaya is the forename as well as the last name.