Jean III de Brosse (d. 1502) was Count of Penthièvre from 1480 until his death. He was the elder son of Jean II de Brosse and Nicole, Countess of Penthièvre.
On 15 May 1468, he married Louise de Laval, daughter of Guy XIV de Laval and Isabelle of Brittany. They had one son, René de Brosse, and four daughters.
Ancestors of Jean III de Brosse |
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| | | | | | | | | 16. Louis I de Brosse | | | | | | | 8. Pierre II de Brosse, Lord of Boussac | | | | | | | | | | 17. Constance de La Tour | | | | | | | 4. Jean I de Brosse, Lord of Boussac | | | | | | | | | | | | 18. Louis de Malval, Lord of Maleval | | | | | | | 9. Marguerite de Malval, Lady of La Forêt | | | | | | | | | | 19. Galienne de Malval | | | | | | | 2. Jean II de Brosse, Lord of Boussac | | | | | | | | | | | | | | 20. Périchon de Naillac, Viscount of Bridiers | | | | | | | 10. Guillaume de Naillac, Viscount of Bridiers | | | | | | | | | | 21. Olive de Saint-Georges | | | | | | | 5. Jeanne de Naillac, Lady of Motte-Jolivet | | | | | | | | | | | | 22. Guy Turpin, Lord of Crissé | | | | | | | 11. Jeanne Turpin | | | | | | | | | | 23. Marie de Rochefort | | | | | | | 1. Jean III de Brosse | | | | | | | | | | | | | | | 24. Charles de Châtillon | | | | | | | 12. Jean I de Châtillon, Count of Penthièvre | | | | | | | | | | 25. Jeanne de Penthièvre | | | | | | | 6. Charles de Châtillon, Lord of Avaugour | | | | | | | | | | | | 26. Olivier V de Clisson, Count of Porhoët | | | | | | | 13. Marguerite de Clisson, Lady of Champtoceau | | | | | | | | | | 27. Catherine de Montmorency-Laval | | | | | | | 3. Nicole, Countess of Penthièvre | | | | | | | | | | | | | | 28. Renaud I de Vivonne, Lord of Thors | | | | | | | 14. Savary V de Vivonne, Lord of Thors | | | | | | | | | | 29. Catherine d'Ancenis, Lady of Esnandes | | | | | | | 7. Isabeau de Vivonne, Lady of Thors | | | | | | | | | | | | 30. Galois d'Aspremont, Lord of Rié | | | | | | | 15. Jeanne d'Aspremont, Lady of Régnac | | | | | | | | | | 31. Julienne Soual | | | | | | | | | | | | | | | | | | | |
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