Surname Mikalajūnas (Mikalajūnas 
, Микалаюнас 
) , all around the world, is a very rare cognomen. The cognomen Mikalajūnas is habitual in Lithuania, where it is quite a rare surname, and Russia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mikalajūnas | Lithuania |
| Микалаюнас | Russia |
| mykolas mikalajūnas LT (b. 1936) |
|
|
| valdas mikalajūnas (b. 1963) |
|
|
| tautvydas mikalajūnas LT (b. 1982) |
|