Family name 路西 (Lussi 
, 路西 
) , in all the world, is quite a rare cognomen. The cognomen 路西 is characteristic of Switzerland, where it is quite a common surname, Austria, where it is a rare surname, and New Zealand. Measured by absolute frequency, it is commonest in Switzerland, Indonesia, and Italy. Likewise, 路西 is the forename as well as the last name.