Last name Ondráček (Ondracek 
, Ondráček ) , around the world, is quite a rare surname. The cognomen Ondráček is habitual in Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Slovenia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Czechia, the United States, and Germany.
| VARIANT | COUNTRY |
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| Ondracek | Austria, Germany, Slovakia, Czechia, United States |
| Ondráček | Czechia, United States |
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raimund ondráček CZ (b. 1913) |
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| antonín ondráček Czech writer and playwright, CZ (b. 1877) |
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emanuel ondráček Czech engineer, university professor, rector of Brno University of Technology, CZ (b. 1931) |
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| vilém ondráček CZ (b. 1876) |
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| bedřich ondráček CZ (b. 1882) |
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| jan ondráček CZ (b. 1891) |
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| karel ondráček CZ (b. 1893) |
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| karel ondráček CZ (b. 1895) |
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| františek ondráček CZ (b. 1896) |
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| jaroslav ondráček CZ (b. 1897) |
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| adolf ondráček (b. 1897) |
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roman ondráček Czech actor, presenter and singer, CZ (b. 1966) |
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| josef ondráček CZ (b. 1907) |
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| františek ondráček (b. 1907) |
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| františek ondráček CZ (b. 1908) |
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Jan, Honza, Hynek, Filip, Filda, Fífa, Martin, Marcel, Matěj, Miloš, Michal, Patrik, Robert, Daniel, Dušan, Luděk, Lumír, Luboš, Jiří, Eduard, Šimon, Matyáš, Jirka, Josef, Jakub, Jarda, Ing, Ivo, Adam, Kuba, Petr, Vít, Marek, Milan, Mirek, Aleš, Michael, Karel, Kubis, Pavel, Peter, Radim, Radek, Roman, Robin, David, Leoš, Libor, Kamil, and Radovan