Cognomen Oshan (Oshan 
, Ошан 
) , in the world, is quite a rare last name. The cognomen Oshan is characteristic of Sri Lanka, where it is quite a rare surname, United Arab Emirates, where it is a rare surname, and Kenya. Not in comparison with a country's population, it is commonest in Southern Asia, particularly Sri Lanka, Bangladesh, and India. More prevalently, Oshan is the forename as well as the last name.