Cognomen Aismontas (Aismontas 
, Айсмонтас 
) , all around the world, is a very rare last name. The family name Aismontas is habitual in Lithuania, where it is a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Aismontas | Lithuania |
| Айсмонтас | Russia |