General Information | ||
| International Stage Name | 3 | |
| Domestic Stage Name | 3 | |
| Full Name | Yoo Byungdeok | |
| Aliases | BOY.D;보이.디;유병덕 | |
| Country of Birth | South Korea | |
| Related Artists | 9 and the Numbers - Instrumental | |
| Original group | 9 and the Numbers | |
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