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Cognomen Langjia (Langjia ) , throughout the world, is an extremely rare surname. Much more frequently, Langjia is the forename as well as the last name.
朗佳, 朗加, 朗嘉, 朗葭, 浪佳, 浪家, 狼甲, 琅嘉, 琅枷, 郎佳, 郎加, and 郎甲
Lin, and Rouse