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Cognomen Ruzicka (Ruzicka , Růžička , Ружичка ) , globally, is a common family name. The family name Ruzicka is habitual in 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, it is commonest in Czechia, the United States, and Slovakia. Much less frequently, Ruzicka is the forename as well as the last name.