| Title | Age |
|---|---|
| Civil engineering | 9 years, 34 weeks and 5 days |
| Engineering | 9 years, 34 weeks and 5 days |
| Johnny Cash | 9 years, 34 weeks and 5 days |
| Physics | 9 years, 34 weeks and 5 days |
| John Cena | 9 years, 34 weeks and 5 days |
| John F. Kennedy | 9 years, 34 weeks and 5 days |
| Joseph Stalin | 9 years, 34 weeks and 5 days |
| Johnny Depp | 9 years, 34 weeks and 5 days |
| John Kerry | 9 years, 34 weeks and 5 days |
| Jos Verstappen | 9 years, 34 weeks and 5 days |