Last name Samuin (Samuin 
) , across the world, is a rare family name. The surname Samuin is habitual in South-eastern Asia, particularly Malaysia, where it is a rare surname, Indonesia, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Indonesia, Malaysia, and India. More prevalently, Samuin is the forename as well as the last name.