Family name Setkus (Setkus 
) , globally, is a rare last name. The cognomen Setkus is habitual in Northern Europe, particularly Lithuania, where it is quite a rare surname, Norway, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Setkus | Norway, United Kingdom, United States, Canada, Lithuania |