Surname ファス (Fath 
, Ruas 
, Faas ) , worldwide, is a common cognomen. The surname ファス is characteristic of Portugal, where it is quite a common surname, Netherlands, where it is quite a rare surname, and Morocco. Measured by absolute frequency, this name is the most popular in Brazil, Indonesia, and Germany. Much less frequently, ファス is the forename as well as the last name.