Cognomen Hack (Hack 
, 哈克 
, هاك 
, and others...) , across the world, is a common surname. The last name Hack is characteristic of Guam, where it is quite a common surname, Germany, and Luxembourg, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Germany, the United States, and Brazil. Very seldom, Hack is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hack | Germany, Indonesia, United Kingdom, United States, Brazil |
| 哈克 | China |
| هاك | Egypt, Algeria, Iraq, Saudi Arabia |
| ハック | Japan |
| Hacken | Germany, United Kingdom, United States, Canada, Brazil |
| niels hack (b. 1450) |
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| jakob hack (b. 1579) |
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| franz hack (b. 1650) |
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| william hack Hack, William (fl. 1671–1702), chart maker (b. 1671) |
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| isaac hack (born 1730) (b. 1730) |
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john barton hack Australian settler (b. 1805) |
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hack kampmann Danish politician, DK (b. 1813) |
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| isaac hack (1774-1850) (b. 1774) |
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| maria hack British writer (b. 1777) |
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| priscilla hack (b. 1784) |
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lester g. hack American Civil War recipient of the Medal of Honor, US (b. 1844) |
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hack kampmann Danish architect, DK (b. 1856) |
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| esther eliza hack (1811-1891) (b. 1811) |
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| christopher amory hack (b. 1806) |
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hack u. stephenson American politician, US (b. 1872) |
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