Surname 吉宇 (Jiyu 
, 吉宇 ) , across the world, is quite a rare family name. The last name 吉宇 is characteristic of Nigeria, where it is a rare surname, South Korea, and Malaysia. In absolute terms, it is the most numerous in Nigeria, China, and South Korea. More prevalently, 吉宇 is the forename as well as the last name.