In the world, 정근 (정근 
, Jeonggeun 
, Jeong-Geun) is quite a rare boy's given name. The first name 정근 is habitual in Eastern Asia, particularly South Korea, where it is quite a rare masculine name. Much less frequently, 정근 is the last name as well as the forename.
| VARIANT | COUNTRY |
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| 정근 | South Korea |
| Jeonggeun | South Korea, China, United States |
| 박정근 South Korean politician, KR (b. 1899) |
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신정근 South Korean actor, KR (b. 1966) |
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| 김정근 South Korean politician (1916-1995), KR (b. 1916) |
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| 안정근 South Korean sport shooter, KR (b. 1924) |
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| 오정근 South Korean politician, KR (b. 1929) |
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박정근 South Korean photographer and activist, KR (b. 1988) |
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| 박정근 KR (b. 1942) |
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| 이정근 KR (b. 1948) |
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| 박정근 South Korean Go player, KR (b. 1986) |
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| 김정근 KR (b. 1977) |
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| 이정근 South Korean association football player (1990-), KR (b. 1990) |
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| 이정근 association football player (1994-), KR (b. 1994) |
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| 배정근 KR (b. 1990) |
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