Surname Duy (Duy 
, Зуй 
, دوي 
) , all over the world, is a common last name. The surname Duy is habitual in Vietnam, where it is quite a common surname, Macao, where it is quite a rare surname, and Belarus. Measured by absolute frequency, the name is most common in Vietnam, Ukraine, and Russia. Also, Duy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Duy | Malaysia, France, United States, Japan, Vietnam |
| Зуй | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| دوي | Palestinian Territory, Sudan, Algeria, Iraq, Egypt |
| ズイ | Japan |
| albert william duy Episcopalian minister (b. 1823) |
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| đặng văn duy VN (b. 1924) |
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| cuong do duy researcher |
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| luc minh duy researcher |
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| bùi công duy Vietnamese violinist, VN (b. 1981) |
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| nguyên duy |
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| david khuat duy FR |
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| thanh duy VN (b. 1986) |
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| phạm đình duy Vietnamese footballer |
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