Cognomen Assain (Assain 
) , in the entire world, is a rare last name. The surname Assain is habitual in United Arab Emirates, where it is a rare surname, Saudi Arabia, and Argentina, where it is a very rare surname. Not in comparison with a country's population, the name is most common in India, Saudi Arabia, and United Arab Emirates. More frequently, Assain is the forename as well as the last name.