Globally, Sung-Hwan (성환 
, Sung-Hwan 
) is quite a rare boy's first name. The first name Sung-Hwan is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare boy's name. Parts of the name also exists independently as a last name Sung, and a last name Hwan.
| VARIANT | COUNTRY |
|---|---|
| 성환 | South Korea |
| Sung-Hwan | Canada, United States, South Korea |
Seong-Hwan, Seung-Hwan, スンファン, ソンファン, 成焕, and 승환
| sung-hwan moon researcher (ORCID 0000-0002-6642-5699) |
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| sung-hwan eom researcher |
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| sung-hwan choi researcher |
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| sung-hwan jang researcher |
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| sung-hwan moon researcher (ORCID 0000-0002-7750-0818) |
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| sung-hwan kim researcher |
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| sung-hwan yun researcher |
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| sung-hwan oh |
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