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Family name Mäng (Mäng ) , in the world, is an extremely rare cognomen. The cognomen Mäng is habitual in Northern Europe, particularly Estonia, where it is a rare surname.
Maeng, Maing, Meng, Mèng, Mạnh, Менг, メン, 孟, 孟氏, and 맹
Martin, and Ilmari