Family name Jancsó (Jancsó 
, יאנצ'ו 
) , around the world, is a rare last name. The family name Jancsó is habitual in Hungary, where it is quite a rare surname, Romania, where it is a rare surname, and Brazil, where it is an extremely rare surname. Very seldom, Jancsó is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Jancsó | Romania, Germany, Hungary, Brazil, United States |
| יאנצ'ו | Israel |
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pál jancsó Hungarian actor, RO (b. 1761) |
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miklós jancsó Hungarian physician (1868-1930), RO (b. 1868) |
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| jancsó józsef (b. 1821) |
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jancsó miklós Hungarian pharmacologist, HU (b. 1903) |
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| jancsó györgy HU (b. 1853) |
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jancsó miklós Hungarian film director and screenwriter (1921–2014), HU (b. 1921) |
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| károly jancsó (1875-1926) journalist, lawyer, RO (b. 1875) |
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| ilona jancsó (b. 1869) |
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miklós jancsó Hungarian writer and actor, RO (b. 1946) |
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jancsó sarolta Hungarian actress, HU (b. 1951) |
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jancsó miklós Hungarian cinematographer, HU (b. 1952) |
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| béla jancsó Romanian writer (1903-1967), RO (b. 1903) |
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| elemér jancsó Hungarian literary historian from Transylvania, RO (b. 1905) |
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| endre jancsó (b. 1906) |
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| jancsó adrienne Hungarian actress (1921-2006), HU (b. 1921) |
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Anna, Dorina, Dávid, Gábor, János, Tamás, Tímea, Nándi, Ferenc, Wiktor, Zsolti, Ádám, Ágnes, Miklós, Mihály, András, Adrienn, Balázs, Beatrix, Bálint, Katalin, Dániel, Rebeka, Roland, Péter, Paôla, Tomi, Éva, Maria, Anita, Csaba, Kitti, Réka, Gyula, Janka, Judit, Gergely, Tibor, Erika, Emese, Zsolt, Áron, Máté, Stella, Andrea, Attila, Beáta, Patrik, Edina, and Levente