Family name Gwyn (根 
, Gwyn 
, Wyn 
) , in the world, is a common cognomen. The surname Gwyn is characteristic of China, where it is quite a rare surname, Belgium, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, the name is most common in China, the United States, and Indonesia. More prevalently, Gwyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 根 | China |
| Gwyn | China, Indonesia, United Kingdom, Australia, United States |
| Wyn | China, Indonesia, United Kingdom, United States, Myanmar |
| جوين | Yemen, Iran, Iraq, Saudi Arabia |
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richard gwyn Welsh martyr, GB (b. 1537) |
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nell gwyn Royal mistress (1650-1687), GB (b. 1650) |
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| francis gwyn Welsh politician and official, GB (b. 1648) |
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| edward prideaux gwyn British Member of Parliament (died 1736) (b. 1695) |
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| francis edward gwyn British Army officer (1748 - 1821) (b. 1748) |
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| john gwyn Derry linen merchant and benefactor (b. 1755) |
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howel gwyn British politician (1806-1888), GB (b. 1806) |
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james gwyn officer in the Union Army during the American Civil War., US (b. 1828) |
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herbert britton gwyn American newspaper editor (b. 1873) |
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richard gwyn Canadian journalist, author, civil servant, CA (b. 1934) |
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| branwen gwyn British television presenter, GB (b. 1901) |
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richard gwyn British writer, GB (b. 1956) |
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| john gwyn British writer and Egyptologist, GB (b. 1911) |
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| sandra gwyn Canadian journalist, CA (b. 1935) |
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| aled gwyn (b. 1940) |
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