Surname Horvai (Horvai 
) , around the world, is a rare family name. The surname Horvai is characteristic of Hungary, where it is quite a rare surname, Czechia, where it is a rare surname, and Netherlands, where it is a very rare surname. Very seldom, Horvai is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Horvai | Hungary, Australia, Netherlands, Czechia, United States |
| horvai rezső Hungarian chemist (1920-1967), HU (b. 1920) |
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| horvai istván Hungarian theatre director (1922-2004), HU (b. 1922) |
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| horvai iván HU (b. 1926) |
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| horvai györgy HU (b. 1949) |
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| andrew e horvai researcher |
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