Surname ジャイ (Jai 
, ジャイ 
) , across the world, is a common family name. The cognomen ジャイ is characteristic of Macao, where it is quite a common surname, Brunei, and Hong Kong. In absolute terms, it is commonest in India, Indonesia, and Myanmar. More prevalently, ジャイ is the forename as well as the last name.