Last name Růžička (Ruzicka 
, Růžička 
, Ружичка 
) , all over the world, is a common surname. The surname Růžička is characteristic of Czechia, where it is a common surname, Slovakia, where it is quite a common surname, and Austria, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Czechia, the United States, and Slovakia. Very seldom, Růžička is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruzicka | Germany, Austria, Slovakia, United States, Czechia |
| Růžička | Germany, Austria, France, United States, Czechia |
| Ружичка | Ukraine, Russia, Kyrgyzstan |
| evermond tadeáš růžička (1711-1780), CZ (b. 1711) |
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arnošt konstantin růžička Czech catholic priest (1761-1845), CZ (b. 1761) |
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josef růžička theologian and opinion journalist from Slowakia, CZ (b. 1808) |
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| václav apolinarius růžička (b. 1757) |
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adolf růžička czech physician and first amateur photographer in town of Rožmitál pod Třemšínem, CZ (b. 1851) |
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| jeroným růžička CZ (b. 1794) |
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| josef růžička CZ (b. 1795) |
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| jan růžička Czech teacher (1808-1865), CZ (b. 1808) |
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apollo růžička CZ (b. 1856) |
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| matěj růžička CZ (b. 1807) |
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drahomír josef růžička Czech photographer, CZ (b. 1870) |
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| anna vlastimila růžička (1824-1869) (b. 1824) |
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| karel růžička CZ (b. 1827) |
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| jan růžička Czech teacher and musician (1841-1905), CZ (b. 1841) |
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| josef růžička teacher (1843–1919), CZ (b. 1843) |
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Bob, Boris, Karel, Kamil, Kája, Pavel, Radim, Radek, Roman, Robin, Denis, Danda, David, Ladik, Leoš, Libor, Lukas, Luban, Janek, Jarek, Jarda, Jakub, Adolf, Aleš, Míra, Mirek, Dan, Jan, Tom, Eda, Ing, Ivo, Mara, Adam, Kuba, Pata, Josef, Petr, Vít, Ivan, Igor, Oleg, Marie, Marek, Matty, Mates, Majkl, Milan, Ruda, and Jenda