Cognomen Ridala (Ridala 
) , worldwide, is a rare last name. The cognomen Ridala is characteristic of Estonia, where it is quite a rare surname, Finland, where it is a very rare surname, and Indonesia. Measured by absolute frequency, it is commonest in India, Indonesia, and Estonia. Much less frequently, Ridala is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ridala | Philippines, India, Finland, Estonia, Indonesia |
| elfriede ridala (b. 1903) |
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| mart ridala badminton player, EE (b. 1970) |
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| riho ridala badminton player, EE (b. 1971) |
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