Family name Yukio (Yukio 
, ユキオ , Юкио 
) , worldwide, is a common cognomen. The family name Yukio is habitual in Japan, where it is quite a common surname, Cyprus, where it is quite a rare surname, and Singapore, where it is a rare surname. Measured by absolute frequency, it is commonest in Japan, China, and Indonesia. Much less frequently, Yukio is the forename as well as the last name.