Last name Kelasi (Kelasi 
, กะลาสี 
) , throughout the world, is a rare family name. The surname Kelasi is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, Myanmar, where it is a very rare surname, and Malaysia. In absolute terms, this name is the most popular in Thailand, India, and Myanmar. Much more prevalently, Kelasi is the forename as well as the last name.