Last name Knast (Knast 
, קנס 
) , in the world, is a rare family name. The surname Knast is characteristic of Poland, where it is a rare surname, Sweden, and Israel, where it is a very rare surname. In absolute terms, it is the most numerous in Poland, the United States, and Sweden. Likewise, Knast is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Knast | Sweden, China, United States, Germany, Poland |
| קנס | Israel |
| antoni knast PL (b. 1814) |
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| bolesław knast PL (b. 1879) |
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| ignacy knast PL (b. 1884) |
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alicja knast Polish museum director and music historian, PL (b. 1972) |
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| alicja knast actress (1928-2015) (b. 1928) |
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| witold knast Polish surgeon, PL (b. 1933) |
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| marian knast PL (b. 1923) |
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| wiesław knast (b. 1923) |
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