Commune/Paroisse : Vieux-Genappe [Brabant Wallon] 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | JACOB | 1752 | 1 |
| 2. | JACQUET | 1794-1796 | 3 |
| 3. | JADIN | 1793 | 1 |
| 4. | JAMBE | 1781 | 1 |
| 5. | JANCART | 1740 | 1 |
| 6. | JANOUL | 1761 | 1 |
| 7. | JAQUET | 1795 | 1 |
| 8. | JAUMART | 1738 | 1 |
| 9. | JENAR | 1796 | 1 |
| 10. | JENART | 1763-1788 | 8 |
| 11. | JOEANG | 1781 | 1 |
| 12. | JOISSE | 1739 | 1 |
| 13. | JOSEPH | 1788 | 1 |
| 14. | JOTTRAND | 1784 | 2 |
| 15. | JOURNE | 1749 | 1 |
| 16. | JOURNY | 1781 | 1 |
| 17. | JOUWE | 1745 | 1 |