Last name Diep (Diep 
, Dyby 
, Диеп 
) , worldwide, is a common cognomen. The last name Diep is habitual in British Virgin Islands, where it is quite a common surname, Macao, where it is quite a rare surname, and Vietnam. Not in comparison with a country's population, it is commonest in Vietnam, the United States, and Malaysia. Likewise, Diep is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Diep | Vietnam, Malaysia, Australia, United States, Canada |
| Dyby | China, United Kingdom, Nicaragua, Thailand, France |
| Диеп | Russia |
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vi an diep Canadian musician based in Calgary, CA |
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thuy diep American fashion designer, US (b. 1980) |
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tyler diep American politician, US (b. 1983) |
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françoise diep FR |
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| hung t diep Vietnamese physicist, VN (b. 1948) |
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| nhu diep Norwegian illustrator (b. 1978) |
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| anh l diep researcher |
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| thi ai diep researcher ORCID ID = 0000-0003-2681-1090 |
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| diep t n tran researcher |
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| diep r. ganguly researcher |
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| diep ngoc do Doctor of Sciences 1995 |
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| calvin diep researcher |
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| jimmy diep physician |
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| my diep researcher |
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| robert diep researcher |
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