Surname Яина (Jaina 
, Yaina 
, Iaina 
) , in the entire world, is a common cognomen. The last name Яина is characteristic of India, where it is quite a rare surname, Venezuela, where it is a rare surname, and Mexico. In absolute terms, it is commonest in India, Mexico, and Russia. Likewise, Яина is the forename as well as the last name.