Surname 威西 (威西 
, Withey 
) , all over the world, is quite a rare family name. The last name 威西 is characteristic of the United Kingdom, where it is quite a rare surname, New Zealand, and Kenya, where it is a rare surname. Measured by absolute frequency, the name is most common in the United Kingdom, the United States, and Kenya. Much less frequently, 威西 is the forename as well as the last name.