Last name Yakai (亚凯 
, Yakai 
, ยะไข่) , throughout the world, is quite a rare cognomen. The cognomen Yakai is characteristic of Japan, where it is a rare surname, China, where it is a very rare surname, and Malaysia. Measured by absolute frequency, this name is the most popular in Japan, China, and India. More prevalently, Yakai is the forename as well as the last name.