Family name Damnu (Damnu 
) , all over the world, is a very rare last name. The cognomen Damnu is habitual in Thailand, where it is a very rare surname, Canada, where it is an extremely rare surname, and India. More prevalently, Damnu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Damnu | China, United States, Thailand, India, Canada |