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Cognomen Ridza (Ridza ) , in all the world, is a rare last name. The surname Ridza is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a rare surname, Singapore, where it is a rare surname, and Indonesia, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in South-eastern Asia, particularly Malaysia, Indonesia, and Myanmar. Also, Ridza is the forename as well as the last name.