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Last name Huaijia (Huaijia ) , in the world, is an extremely rare surname. Much more prevalently, Huaijia is the forename as well as the last name.
怀佳, 怀加, 怀嘉, 怀家, 怀甲, 怀稼, 怀颊, 淮佳, and 淮家
Li, Xi, Xue, Yang, and Zhang