Surname พี่ (Phi 
, Npai 
, Ppee ) , around the world, is a common cognomen. The last name พี่ is habitual in Brunei, where it is quite a common surname, Vietnam, where it is quite a rare surname, and Macao. Measured by absolute frequency, it most frequently occurs in South-eastern Asia, particularly Vietnam, Myanmar, and Indonesia. Likewise, พี่ is the forename as well as the last name.