Cognomen Siirde (Siirde 
) , globally, is a very rare family name. The last name Siirde is habitual in Northern Europe, particularly Estonia, where it is quite a rare surname, and Finland, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Siirde | Estonia, Finland |
| elmar siirde (b. 1910) |
|
|
| enno siirde EE (b. 1919) |
|