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Surname Saidzhon (Саиджон , Saidzhon ) , all around the world, is a very rare last name. The cognomen Saidzhon is habitual in Kyrgyzstan, where it is quite a rare surname, and Russia, where it is an extremely rare surname. Much more frequently, Saidzhon is the forename as well as the last name.
Umarov, and Saifullaev