Family name 吉素 (吉素 
, Jsu 
) , in the world, is a very rare cognomen. The surname 吉素 is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, Malaysia, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in Indonesia, China, and Thailand. Also, 吉素 is the forename as well as the last name.