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Last name สุทธิสิทธิ์ (สุทธิสิทธิ์ , Suttisit , Sutthisit ) , all over the world, is a rare cognomen. The cognomen สุทธิสิทธิ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, สุทธิสิทธิ์ is the forename as well as the last name.