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Family name 당 (당 ) , throughout the world, is a rare cognomen. The cognomen 당 is habitual in Eastern Asia, particularly South Korea, where it is a rare surname.
Dang, Deng, Dèng, Tang, Tchang, Teng, Đặng, Денг, Дэн, Тан, Танг, דנג, الإسباني, تانغ, تنغ, دينغ, 唐, 邓, 邓氏, and 鄧