Cognomen Ф (F 
, Ф 
) , in all the world, is a widespread surname. The cognomen Ф is habitual in China, where it is quite a common surname, Venezuela, and Indonesia (explore the name in all countries). Measured by absolute frequency, it is commonest in China, Indonesia, and Pakistan. Likewise, Ф is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| F | Netherlands, China, Indonesia, Canada, Taiwan |
| Ф | Russia, China, Kazakhstan, Ukraine, Armenia |