Cognomen Jánosi (Jánosi 
) , all over the world, is a rare last name. The cognomen Jánosi is habitual in Hungary, where it is quite a rare surname, Romania, where it is a rare surname, and Belgium, where it is a very rare surname. Very seldom, Jánosi is the forename as well as the last name.
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| Jánosi | United Kingdom, Belgium, Hungary, Romania, Germany |
| jánosi ferenc Hungarian journalist (1819-1879), HU (b. 1819) |
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| jánosi gusztáv Hungarian Catholic priest, translator, HU (b. 1841) |
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| jánosi béla Hungarian historian of science, aesthetician and high school teacher (1857–1921), HU (b. 1857) |
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jánosi ferenc archivist, reformed pastor, politician (1916–1968), HU (b. 1916) |
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| jánosi zoltán Hungarian reformed pastor (1868–1942), HU (b. 1868) |
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| jánosi józsef Hungarian sculptor, RO (b. 1871) |
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| jánosi györgy Hungarian reformed pastor, writer (1889–1966), HU (b. 1889) |
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jánosi katalin Hungarian painter, HU (b. 1951) |
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| jánosi zelma Hungarian actress, RO (b. 1921) |
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| jánosi ervin correspondence chess player (1936-2015), HU (b. 1936) |
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| jánosi béla Hungarian physicist from Romania (1936–2011), RO (b. 1936) |
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| jánosi józsef Hungarian dancing master, choreographer from Romania, RO (b. 1937) |
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| jánosi ferenc Hungarian volleyball player, HU (b. 1938) |
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| jánosi péter Hungarian opera singer, HU (b. 1940) |
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| jánosi marcell HU (b. 1931) |
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