Surname Iisi (Easy 
, Iisi 
) , throughout the world, is quite a rare last name. The cognomen Iisi is characteristic of Jamaica, where it is quite a common surname, Taiwan, where it is quite a rare surname, and Costa Rica, where it is a rare surname. Measured by absolute frequency, it is commonest in Nigeria, China, and Taiwan. Also, Iisi is the forename as well as the last name.