Family name Жарнасек (Жарнасек 
) , throughout the world, is a very rare surname. The last name Жарнасек is habitual in Eastern Europe, particularly Belarus, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Жарнасек | Russia, Belarus |
| ірына францаўна жарнасек BY (b. 1953) |
|