Last name Onderson (Onderson 
) , across the world, is a very rare cognomen. The surname Onderson is characteristic of Indonesia, where it is a very rare surname, Germany, where it is an extremely rare surname, and Canada. More frequently, Onderson is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Onderson | Brazil, India, Indonesia, Democratic Republic of the Congo, Germany |