All around the world, Colwyn (Colwyn 
) is a rare largely masculine, but seldom girly given name. The given name Colwyn is habitual in South Africa, where it is a rare unisex name, the United Kingdom, where it is a very rare predominantly masculine, but scarcely girly name, and the United States. Very seldom, Colwyn is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Colwyn | United Kingdom, South Africa, Australia, Singapore, United States |
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colwyn henry hughes vulliamy British military personnel, GB (b. 1894) |
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colwyn erasmus arnold philipps (b. 1888) |
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| colwyn edward vulliamy Welsh biographer (1886-1971), GB (b. 1886) |
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| colwyn erasmus arnold philipps (1888-1915) (b. 1888) |
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| colwyn trevarthen New Zealand biologist and psychologist, NZ (b. 1931) |
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| colwyn jestyn john philipps, 3rd viscount st davids British businessman, Conservative politician and writer on music (1939-2009), GB (b. 1939) |
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| colwyn a headley researcher (ORCID 0000-0001-6041-7615) |
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