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Last name ซื่อสัตย์ (Honesto , Faithful , Suesat ) , around the globe, is quite a rare cognomen. The surname ซื่อสัตย์ is characteristic of Thailand, where it is quite a rare surname, Algeria, where it is a rare surname, and Nigeria. Measured by absolute frequency, this name is the most popular in Thailand, Nigeria, and Mexico. Likewise, ซื่อสัตย์ is the forename as well as the last name.