Last name Plei (Plei 
, ไพลอย 
) , all over the world, is a very rare family name. The family name Plei is characteristic of Thailand, where it is a very rare surname, Germany, and Spain, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Germany, Thailand, and India. Very seldom, Plei is the forename as well as the last name.