Last name Sumahan (Sumahan 
) , all around the world, is a very rare cognomen. The last name Sumahan is habitual in South-eastern Asia, particularly Malaysia, where it is a very rare surname, Philippines, where it is an extremely rare surname, and Thailand. Not in comparison with a country's population, this name is the most popular in India, Philippines, and Malaysia. Likewise, Sumahan is the forename as well as the last name.