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Family name 龙氏 (龙氏 ) , in the world, is an extremely rare last name. Much more frequently, 龙氏 is the forename as well as the last name.
Long, Longová, Loong, Lung, Lêng, Лонг, לונג, لونج, لونغ, ロング, 朗, 隆, 龍, 龍氏, and 龙