| Name | Ranking | Count |
| Jiu | 🥇 1st | 46,474 |
| Juwon | 12th | 32,220 |
| Jian | 17th | 29,578 |
| Jiwon | 18th | 29,423 |
| Jiyu | 23th | 26,925 |
| Junu | 26th | 24,201 |
| Jiyun | 27th | 24,086 |
| Jia | 34th | 22,367 |
| Jiyul | 49th | 19,324 |
| Jeongu | 62th | 15,983 |
| Jua | 82th | 13,767 |
| Jinu | 97th | 12,274 |
| Junyeong | 100th | 12,059 |
| Jaeyun | 108th | 11,337 |
| Jeongwon | 115th | 10,629 |
| Jaewon | 126th | 9,857 |
| Jieun | 132th | 9,607 |
| Jaei | 151th | 8,590 |
| Jio | 181th | 7,528 |
| Jueun | 195th | 7,008 |
| Jiyeon | 197th | 6,965 |
| Juyeong | 203th | 6,844 |
| Juan | 204th | 6,838 |
| Jion | 225th | 6,206 |
| Jiwan | 230th | 6,142 |
| Jaein | 238th | 6,005 |
| Jeongyun | 265th | 5,404 |
| Juyeon | 272th | 5,268 |
| Jaeyeong | 312th | 4,606 |
| Jiyeong | 320th | 4,519 |
Data is updated every day based on Family Relations Registration System.
Data after 2021 may differ slightly from actual data.