Surname Montvilaitė (Montvilaitė 
, Монтвилайте 
) , in all the world, is a very rare last name. The last name Montvilaitė is characteristic of Lithuania, where it is a rare surname, and Russia, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Montvilaitė | Lithuania |
| Монтвилайте | Russia |