Last name Ružek (Ružek 
) , across the world, is a rare cognomen. The cognomen Ružek is habitual in Croatia, where it is quite a rare surname, and Slovakia, where it is a rare surname.
| rudolf ružek holocaust victim, b. 1887-05-14, CZ (b. 1887) |
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| karel ružek holocaust victim, b. 1892-06-07, CZ (b. 1892) |
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| vilém ružek holocaust victim, b. 1895-08-09, CZ (b. 1895) |
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| karel ružek holocaust victim, b. 1904-04-04, CZ (b. 1904) |
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| emil ružek holocaust victim, b. 1906-02-13, CZ (b. 1906) |
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