In the entire world, Justinas (Justinas 
, Юстинас 
, Юстінас ) is quite a rare boy's given name. The forename Justinas is habitual in Northern Europe, particularly Lithuania, where it is quite a common male name, Latvia, where it is quite a rare masculine name, and Ireland, where it is a rare masculine name. Not in comparison with a country's population, it most frequently occurs in Lithuania, the United Kingdom, and the United States. Very seldom, Justinas is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Justinas | Sweden, Lithuania, Ireland, United Kingdom, United States |
| Юстинас | Ukraine, Kazakhstan, Belarus, Lithuania, Russia |
| Юстінас | Ukraine |
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justinas bonaventūra pranaitis Lithuanian priest (1861-1917), LT (b. 1861) |
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justinas zubrickas LT (b. 1868) |
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justinas bružas LT (b. 1915) |
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justinas marcinkevičius poet (1930-2011), LT (b. 1930) |
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| justinas baltuška (b. 1871) |
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| justinas vareikis LT (b. 1872) |
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| justinas kulikauskas (b. 1874) |
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| justinas tumėnas (b. 1881) |
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| justinas kudirka Lithuanian singer, LT (b. 1893) |
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| justinas dubininkas Lithuanian Righteous Among the Nations, LT (b. 1893) |
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| justinas lapis (b. 1884) |
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| justinas strimaitis Lithuanian poet, LT (b. 1895) |
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| justinas juodaitis Lithuanian priest, LT (b. 1899) |
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| justinas kibirkštis LT (b. 1894) |
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| justinas dabrila Lithuanian university teacher and catholic priest (1905-1941), LT (b. 1905) |
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Ys, Marcinkrvicius, Adomaitis, Baltrunas, Bertasius, Kaminskas, Jankauskas, Zukauskas, Balčiūnas, Brazinskas, Karaliunas, Jokubauskas, Ivanauskas, Žilinskas, Černiauskas, Sakalauskas, Sinkevicius, Baranauskas, Kristopaitis, Radzevicius, Stankevicius, Bartkevicius, Navickas, Janulevicius, Bernotas, Savickas, Nas, Ius, Burba, Bimba, Mockus, Mickus, Slinys, Butkus, Kairys, Pocius, Rimkus, Guobys, Justas, Norkus, Sereika, Stankus, Baronas, Blažys, Katinas, Gricius, Urbonas, Bagdonas, and Jasiulevicius