Jungkook does not have a twin brother; however, he does have an older brother.
Based on the provided reference:
- Jeon Jung-hyun is Jungkook's older brother.
| Detail | Information |
|---|---|
| Jungkook's Brother | Jeon Jung-hyun |
| Relation | Older Brother |
| Twin | No |
Therefore, the answer to the question is that Jungkook does not have a twin brother. He has an older brother named Jeon Jung-hyun.
