Cognomen 孝之 (Takayuki 
, 孝之 ) , globally, is quite a rare surname. The surname 孝之 is habitual in Japan, where it is quite a rare surname, Cyprus, and Singapore, where it is a rare surname. Measured by absolute frequency, the name is most common in Japan, China, and Indonesia. Likewise, 孝之 is the forename as well as the last name.