Knize may refer to:
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Kníže (title), equivalent of "duke" or "prince", used in medieval Slavic countries such as Bohemia
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Kniže & Comp., the Viennese clothing store named after a Czech surname
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Josef Kniže (d. 1880), Czech tailor who founded Kniže & Comp.
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Frederic Wolff-Knize (1890–1949), Austrian businessman and art collector
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Petr Kníže, Czech martial artist
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