Surname Herwyn (Herwyn 
) , throughout the world, is a very rare cognomen. The cognomen Herwyn is habitual in Belgium, where it is a rare surname, France, where it is a very rare surname, and Venezuela. Likewise, Herwyn is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Herwyn | Philippines, France, Venezuela, United States, Belgium |
| philippe jacques herwyn French politician, FR (b. 1750) |
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| pierre-antoine herwyn de nevèle French politician, FR (b. 1753) |
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| charles herwyn BE |
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