Family name Piyao (ปิยะ 
, Piyao 
, 丕瑶 
) , all around the world, is a rare surname. The surname Piyao is habitual in South-eastern Asia, particularly Philippines, where it is a rare surname, Thailand, and Malaysia, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Philippines, Thailand, and Pakistan. Predominantly, Piyao is the forename as well as the last name.