Surname Яхан (Jahan 
, Яхан 
) , in all the world, is a prevalent cognomen. The family name Яхан is habitual in Bangladesh, where it is a common surname, India, where it is quite a common surname, and Oman (explore the name in all countries). In absolute terms, it is the most numerous in Southern Asia, particularly India, Bangladesh, and Pakistan. Much less frequently, Яхан is the forename as well as the last name.