Cognomen Suonoja (Suonoja 
) , in the world, is a very rare family name. The family name Suonoja is characteristic of Northern Europe, particularly Finland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Suonoja | Finland |
|
soili suonoja Finnish businessperson, FI (b. 1944) |
|
| riikka suonoja FI |
|