Commune/Paroisse : Castelnau-Rivière-Basse [Hautes-Pyrénées] 
| Patronymes | Périodes | Actes | |
|---|---|---|---|
| 1. | LABAYLE | 1774 | 1 |
| 2. | LABENE | 1740 | 1 |
| 3. | LABORDE | 1788 | 1 |
| 4. | LABORE (DE) | 1737 | 1 |
| 5. | LABORIE | 1739 | 1 |
| 6. | LABOUBÉE | 1741-1786 | 10 |
| 7. | LABOUTERS | 1789 | 1 |
| 8. | LACARRERE | 1744-1786 | 2 |
| 9. | LACAVE | 1740-1778 | 4 |
| 10. | LACCARRESTE | 1772 | 1 |
| 11. | LACOSTE | 1738-1785 | 5 |
| 12. | LACOUSTELE | 1739 | 1 |
| 13. | LACROIX | 1737-1789 | 12 |
| 14. | LAFITTE | 1737-1789 | 20 |
| 15. | LAFOURCADE | 1775 | 1 |
| 16. | LAGRANGE | 1738-1777 | 4 |
| 17. | LAGRANGE (DE) | 1739 | 1 |
| 18. | LAHENS | 1739 | 1 |
| 19. | LAJOLE | 1773 | 1 |
| 20. | LAJUS | 1776 | 1 |
| 21. | LALANNE | 1742-1779 | 3 |
| 22. | LAMARQUE | 1740 | 1 |
| 23. | LAMAZOUADE | 1740-1791 | 10 |
| 24. | LANGET | 1741 | 1 |
| 25. | LANUSSOL | 1777 | 1 |
| 26. | LAPLANTE | 1771 | 1 |
| 27. | LAPORTE | 1778 | 1 |
| 28. | LARCADE | 1774 | 1 |
| 29. | LARQUASITES | 1792 | 1 |
| 30. | LARRAMÉE | 1739 | 2 |
| 31. | LASBATS | 1739 | 1 |
| 32. | LATERRADE | 1788 | 1 |
| 33. | LAUBADERE DARTIGAUX | 1743 | 1 |
| 34. | LAUQUERAT (DE) | 1768 | 1 |
| 35. | LAURENSON | 1784 | 1 |
| 36. | LAUZET | 1772 | 1 |
| 37. | LERM | 1789 | 1 |
| 38. | LOUBATERES | 1741-1778 | 4 |
| 39. | LUBOYE (DE) | 1777 | 1 |
