All around the world, 성자 (성자 
, Seongja 
, Sung-Ja 
) is a rare girly first name. The forename 성자 is characteristic of Eastern Asia, particularly South Korea, where it is quite a rare feminine name.
| VARIANT | COUNTRY |
|---|---|
| 성자 | South Korea |
| Seongja | South Korea, United States, China |
| Sung-Ja | United Kingdom, United States |
| Seong-Ja | Canada |
| 이성자 Korean painter (1918-2009), KR (b. 1918) |
|
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| 신성자 South Korean fencer, KR (b. 1968) |
|
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| 박성자 Olympic judoka, KR (b. 1980) |
|