Cognomen 吉玉 (Jiyu 
, 吉玉 ) , around the world, is quite a rare last name. The family name 吉玉 is habitual in Nigeria, where it is a rare surname, South Korea, and Malaysia. Measured by absolute frequency, this name is the most popular in Nigeria, China, and South Korea. More prevalently, 吉玉 is the forename as well as the last name.