Family name Petraitis (Petraitis 
, Петрайтис 
) , throughout the world, is quite a rare last name. The cognomen Petraitis is habitual in Northern Europe, particularly Lithuania, where it is a common surname, Estonia, where it is quite a rare surname, and Latvia. Measured by absolute frequency, this name is the most popular in Lithuania, the United States, and Russia.
| antanas petraitis Lithuanian priest and astronomer (1861-1933) (b. 1861) |
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gintautas petraitis Lithuanian chess player, LT (b. 1944) |
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| juozas petraitis LT (b. 1884) |
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| julius petraitis Lithuanian athletics competitor, LT (b. 1905) |
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| stasys petraitis Lithuanian actor, LT (b. 1905) |
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| teofilis petraitis LT (b. 1896) |
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| kazimieras petraitis politician (b. 1927) |
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| pranas petraitis LT (b. 1949) |
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| vikki petraitis Australian true crime author, AU (b. 1965) |
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| juozas petraitis (b. 1957) |
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| algimantas petraitis (b. 1967) |
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| peter s petraitis researcher |
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| gediminas petraitis NBA basketball referee since November 15, 2014 |
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| ramunas petraitis college basketball player (1999–2000) Oregon State |
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| erikas petraitis (b. 1978) |
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