Family name Olai (Olai 
, Олай 
, اولاى) , globally, is a rare cognomen. The family name Olai is characteristic of Sweden, where it is quite a rare surname, Norway, where it is a rare surname, and Romania. In absolute terms, the name is most common in Sweden, Romania, and Ukraine. Likewise, Olai is the forename as well as the last name.
| of alvastra petrus olai (b. 1307) |
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| ericus olai Swedish historian and theologian, SE (b. 1401) |
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| andreas olai SE (b. 1521) |
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| benedictus olai SE (b. 1524) |
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| sevardus olai rinman SE (b. 1633) |
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olai pedersen wiig Norwegian politician, NO (b. 1802) |
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olai lorange Norwegian physician (b. 1876) |
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olai skulerud Norwegian philologist, NO (b. 1881) |
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| olai wallin Finnish teacher and author, FI (b. 1832) |
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olai aa. aalen NO (b. 1874) |
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olai fauske Norwegian photographer, NO (b. 1887) |
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olai grønmark (b. 1908) |
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| olai andreason lende American politician – Minnesota -- "O.A., Ola" Senate 1911-14 (District 17); Senate 1915-18 (District 13), US (b. 1873) |
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| olai andreas karlsen-lund Norwegian missionary (b. 1875) |
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olai hillersøy NO (b. 1915) |
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