Cognomen Mačiulaitis (Mačiulaitis 
) , in the world, is a very rare family name. The last name Mačiulaitis is characteristic of Northern Europe, particularly Lithuania, where it is quite a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Mačiulaitis | Lithuania |
| vilius mačiulaitis (b. 1895) |
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| romualdas mačiulaitis LT (b. 1948) |
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| rimantas mačiulaitis LT (b. 1961) |
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| romaldas mačiulaitis researcher |
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