Surname Batn (Batn 
, باتن 
, باطن 
) , around the world, is a rare cognomen. The family name Batn is habitual in Iran, where it is a very rare surname, Algeria, and France, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Iran, Algeria, and India. Also, Batn is the forename as well as the last name.