Surname Upay (Upay 
) , globally, is a rare last name. The family name Upay is characteristic of South-eastern Asia, particularly Indonesia, where it is a rare surname, Myanmar, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Indonesia, Myanmar, and India. More prevalently, Upay is the forename as well as the last name.