Surname Ayuko (Ayuko 
) , in the world, is quite a rare last name. The cognomen Ayuko is habitual in Kenya, where it is quite a rare surname, Indonesia, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Kenya, Indonesia, and China. Very seldom, Ayuko is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ayuko | Kenya, China, Indonesia, United States, Japan |