Cognomen Райдма (Raidma 
, Райдма 
) , worldwide, is a rare family name. The surname Райдма is habitual in Estonia, where it is quite a common surname, Latvia, where it is quite a rare surname, and Belarus, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Raidma | Finland, Estonia, United States, Brazil, Latvia |
| Райдма | Belarus, Russia |