In the entire world, Kyu-Sung (규성 
, Kyu-Sung 
) is a rare male forename. The forename Kyu-Sung is habitual in Eastern Asia, particularly South Korea, where it is quite a rare boy's name. Parts of the name also exists independently as a first name Kyu, and a last name Sung.
| kyu-sung han researcher |
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| kyu-sung lee researcher ORCID ID = 0000-0003-0891-2488 |
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| kyu-sung jeong researcher |
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| kyu-sung kwack researcher |
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| kyu-sung choi researcher (ORCID 0000-0003-3337-4327) |
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| kim kyu-sung South Korean baseball player (1997-) (b. 1997) |
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