Family name ผ่าย (Phai 
, ผ่าย) , in the world, is quite a rare last name. The surname ผ่าย is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, Malaysia, where it is a rare surname, and Myanmar. Measured by absolute frequency, this name is the most popular in India, Myanmar, and Laos. Also, ผ่าย is the forename as well as the last name.