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.
| mykolas mikalajūnas LT (b. 1936) |
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| valdas mikalajūnas (b. 1963) |
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| tautvydas mikalajūnas LT (b. 1982) |
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