Last name Udno (Udno 
) , across the world, is a very rare family name. The last name Udno is characteristic of Thailand, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and the United States. Also, Udno is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Udno | Brazil, India, Nigeria, United States, Thailand |