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Cognomen Lanchang (兰昌 , Lanchang
, ล้านช้าง) , globally, is a rare surname. The last name Lanchang is habitual in Malaysia, where it is a rare surname, Ecuador, where it is a very rare surname, and China. Not in comparison with a country's population, this name is the most popular in China, Malaysia, and the United States. More prevalently, Lanchang is the forename as well as the last name.