Family name Knaack (Knaack 
) , globally, is quite a rare cognomen. The surname Knaack is habitual in Germany, where it is quite a rare surname, Denmark, and the United States, where it is a rare surname. In absolute terms, it most frequently occurs in Germany, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Knaack | Germany, United States, Denmark, Brazil, Netherlands |
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wilhelm knaack German actor, DE (b. 1829) |
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| georg knaack German teacher and classical philologist, DE (b. 1857) |
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| caroline knaack (b. 1871) |
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susanne knaack German artist, DE (b. 1962) |
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| ernst knaack German resistance member, DE (b. 1914) |
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donald knaack American musician, US |
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| hans knaack (b. 1922) |
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| joachim knaack German biologist, DE (b. 1933) |
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| jürgen knaack German opinion journalist and germanist, DE (b. 1946) |
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| pamela knaack German actress, DE (b. 1963) |
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| jürgen knaack DE (b. 1954) |
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| rüdiger knaack (b. 1955) |
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| thomas knaack badminton player, DE (b. 1967) |
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| peter knaack German actor, DE (b. 1968) |
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| ulrich knaack (b. 1964) |
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