Surname 鯉 (Koi 
, 鯉 
) , all around the world, is a common cognomen. The family name 鯉 is characteristic of Fiji, where it is quite a common surname, Papua New Guinea, and Malaysia, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Malaysia, Indonesia, and Kenya. Also, 鯉 is the forename as well as the last name.