Cognomen 碧西 (Busy 
, 碧西 
) , in the world, is a rare family name. The cognomen 碧西 is habitual in France, where it is a rare surname, Nigeria, where it is a very rare surname, and New Zealand. Measured by absolute frequency, it is the most numerous in Nigeria, France, and Indonesia. Also, 碧西 is the forename as well as the last name.