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Last name Erchang (Erchang ) , throughout the world, is an extremely rare surname. Much more frequently, Erchang is the forename as well as the last name.
二厂, 二唱, 二场, 二常, 二昌, 二畅, 尔倡, 尔厂, 尔昌, 尔昶, 尔畅, and 而昌
Luo, Ping, and Shang