Family name Tomoyuki (Tomoyuki 
, トモユキ , 智之 ) , around the globe, is a common cognomen. The cognomen Tomoyuki is characteristic of Japan, where it is quite a common surname, Singapore, where it is a rare surname, and Hungary. Measured by absolute frequency, this name is the most popular in Japan, China, and Indonesia. Much less frequently, Tomoyuki is the forename as well as the last name.