Surname Pennu (Pennu 
) , in the world, is a very rare family name. The cognomen Pennu is habitual in Thailand, where it is a very rare surname, India, where it is an extremely rare surname, and the United States. Likewise, Pennu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pennu | United States, Thailand, India, Nigeria |