Cognomen Юкаи (Yukai 
, Юкаи 
) , in the entire world, is a rare family name. The surname Юкаи is habitual in Taiwan, where it is a rare surname, Singapore, and Japan. Not in comparison with a country's population, it most frequently occurs in Eastern Asia, particularly Japan, Taiwan, and China. More prevalently, Юкаи is the forename as well as the last name.