Family name Upak (Upak 
, อุปศักดิ์ 
) , all over the world, is a rare cognomen. The surname Upak is characteristic of South-eastern Asia, particularly Philippines, where it is a rare surname, Thailand, where it is a very rare surname, and Malaysia. In absolute terms, this name is the most popular in South-eastern Asia, particularly Philippines, Indonesia, and Thailand. Very seldom, Upak is the forename as well as the last name.