Mariages
Commune/Paroisse : Decazeville [Aveyron] 
| Patronymes | Périodes | Intervenant 1 | Intervenant 2 | |
|---|---|---|---|---|
| 1. | OLIE | 1860-1888 | 1 | 1 |
| 2. | OLIVIE | 1835-1891 | 6 | 12 |
| 3. | OLIVIER | 1843-1891 | 7 | 6 |
| 4. | OLMIERES | 1853 | 1 | - |
| 5. | OLOY | 1861 | - | 1 |
| 6. | OMAR | 1881 | - | 1 |
| 7. | ONDORPHON | 1857-1889 | 3 | - |
| 8. | ORACE | 1892 | - | 1 |
| 9. | ORANGE | 1856 | - | 1 |
| 10. | ORCIBAL | 1843 | - | 1 |
| 11. | ORGEMONT | 1855 | - | 1 |
| 12. | ORLHAC | 1855 | - | 1 |
| 13. | ORSAL | 1848 | 1 | - |
| 14. | ORTAL | 1859-1894 | 1 | 1 |
| 15. | ORTALA | 1863 | 1 | - |
| 16. | ORTELA | 1875 | 1 | - |
| 17. | ORTOLO | 1851 | 1 | - |
| 18. | OSTHEIMER | 1872 | - | 1 |
| 19. | OUILLADE | 1846-1897 | 2 | 3 |
| 20. | OUILLADES | 1858 | - | 1 |
| 21. | OUMINET | 1882 | 1 | - |
| 22. | OUSTRY | 1840-1878 | 2 | 3 |
| 23. | OUVRIER | 1860 | 1 | - |