All over the world, Duy (Duy 
, Зуй 
, دوي 
) is a common male forename. The given name Duy is characteristic of Vietnam, where it is quite a common male name, Macao, where it is quite a common gender-neutral name, and Puerto Rico, where it is quite a rare feminine name. Measured by absolute frequency, it most frequently occurs in Vietnam, the United States, and France. Also, Duy is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Duy | Malaysia, France, United States, Japan, Vietnam |
| Зуй | Kazakhstan, Belarus, Kyrgyzstan, Russia, Ukraine |
| دوي | Palestinian Territory, Sudan, Algeria, Iraq, Egypt |
| ズイ | Japan |
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duy tân Vietnamese emperor, VN (b. 1900) |
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| duy khánh Singer, Songwriter, and music teacher, VN (b. 1936) |
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duy anh tran Czech actor, CZ (b. 1993) |
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| duy khán VN (b. 1934) |
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| nguyễn duy Vietnamese poet, VN (b. 1948) |
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| duy gia nguyễn (b. 1938) |
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| duy quang Vietnamese singer, VN (b. 1950) |
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| duy hậu Vietnamese actor, VN (b. 1951) |
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| duy hùng hồ (b. 1947) |
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| duy thái (b. 1954) |
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| trần từ duy (b. 1958) |
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| lê xuân duy VN (b. 1962) |
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| duy nhất trương (b. 1964) |
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| duy man vu Ph.D. Ernst-Moritz-Arndt-Universität Greifswald 1977 |
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| tran quoc duy Ph.D. Vietnam National University - Ho Chi Minh City 2017 |
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