Cognomen Sidiskis (Sidiskis 
) , globally, is a very rare last name. The surname Sidiskis is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname, and the United Kingdom, where it is an extremely rare surname. Very seldom, Sidiskis is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sidiskis | Belarus, Lithuania, United Kingdom |