Family name Kasniunas (Kasniunas 
) , around the globe, is a very rare surname. The cognomen Kasniunas is habitual in Northern America, particularly the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Kasniunas | United States |
| nina kasniunas American political scientist and professor, US (b. 1972) |
|