Last name Jánossy (Jánossy 
, Яноши 
) , in the world, is a very rare cognomen. The family name Jánossy is characteristic of Eastern Europe, particularly Hungary, where it is a rare surname, Ukraine, where it is a very rare surname, and Russia, where it is an extremely rare surname. Much less frequently, Jánossy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jánossy | Hungary, United Kingdom |
| Яноши | Ukraine, Russia |
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jánossy lajos Hungarian Lutheran pastor, theologian (1903-1976), HU (b. 1903) |
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jánossy györgy architect (1923-1998), HU (b. 1923) |
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| jánossy gábor (b. 1870) |
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| béla p. jánossy RO (b. 1883) |
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| jánossy dénes HU (b. 1891) |
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| jánossy lajos Hungarian scientist, mathematician and astrophysicist, member of the Academy of Science, HU (b. 1912) |
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| jánossy ferenc Hungarian economist and engineer, HU (b. 1914) |
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| jánossy andor HU (b. 1908) |
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| jánossy dénes HU (b. 1926) |
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| jánossy anna Hungarian physician and biologist, HU (b. 1938) |
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| mihály jánossy Hungarian and English physicist, GB (b. 1942) |
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| jánossy andrás Hungarian and British physicist, HU (b. 1944) |
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| istván jánossy British and Hungarian physicist, GB (b. 1945) |
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| jánossy d. lászló RO (b. 1939) |
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| jánossy lászló Hungarian biologist, HU (b. 1955) |
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