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Family name Zuotang (Zuotang ) , in all the world, is an extremely rare cognomen. Much more prevalently, Zuotang is the forename as well as the last name.
佐唐, 佐堂, 佐塘, 佐棠, 作唐, 作堂, 作棠, 作汤, 作瑭, 坐堂, 左堂, 左棠, 座堂, 琢堂, and 祚堂
Yao, and Zhang