Surname Thịnh (Thịnh 
, دو 
) , in the entire world, is a common family name. The family name Thịnh is characteristic of Vietnam, where it is quite a rare surname, Egypt, and Libya. In absolute terms, it is the most numerous in Vietnam, Egypt, and Sudan. Likewise, Thịnh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Thịnh | Japan, Vietnam, Australia, United States, France |
| دو | Saudi Arabia, Sudan, Algeria, Egypt, Syria |
| martinô tạ đức thịnh (b. 1760) |
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| trùm thịnh VN (b. 1883) |
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| thái thịnh VN (b. 1966) |
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| bùi thọ thịnh VN (b. 1972) |
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| noo phước thịnh Vietnamese singer, VN (b. 1988) |
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