Last name 克行 (克行 
, Katsuyuki 
) , around the world, is quite a rare family name. The surname 克行 is habitual in Japan, where it is a rare surname, Taiwan, and Singapore. Not in comparison with a country's population, the name is most common in Eastern Asia, particularly Japan, China, and Taiwan. Also, 克行 is the forename as well as the last name.