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Cognomen Huaishi (Huaishi ) , in the world, is an extremely rare surname. Predominantly, Huaishi is the forename as well as the last name.
怀世, 怀仕, 怀势, 怀十, 怀史, 怀士, 怀实, 怀市, 怀师, 怀希, 怀施, 怀时, 怀氏, 怀狮, 怀石, 怀识, 怀诗, 怀轼, 怀适, 懷師, 槐仕, 淮世, 淮石, and 耲笶
Liu, Song, Wang, Yang, Zhou, and Zhang