Last name 昌西 (Chauncey 
, Chauncy 
, 昌西 ) , around the globe, is quite a rare surname. The cognomen 昌西 is habitual in the United States, where it is a rare surname, Australia, and Malaysia. Not in comparison with a country's population, it most frequently occurs in the United States, Malaysia, and China. More frequently, 昌西 is the forename as well as the last name.