Last name ジャ (Ja 
, Jia 
, Dja ) , in all the world, is a prevalent cognomen. The family name ジャ is habitual in Mongolia, where it is a widespread surname, China, where it is quite a common surname, and Malaysia (explore the name in all countries). In absolute terms, it most frequently occurs in China, India, and Malaysia. Much less frequently, ジャ is the forename as well as the last name.