Cognomen Penoi (Penoi 
) , in all the world, is a very rare family name. The surname Penoi is characteristic of Chile, where it is a rare surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Very seldom, Penoi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Penoi | India, United States, Chile, Thailand |