Olivier, Count of Penthièvre
| Olivier of Penthièvre | |
|---|---|
| Count of Penthièvre | |
| Reign | 16 January 1404 – 28 September 1433 |
| Predecessor | John I |
| Successor | John II |
| Born | c. 1387 |
| Died | 28 September 1433 Avesnes, Hainaut |
| Burial | Collégiale Saint-Nicolas d'Avesnes-sur-Helpe |
| Spouse | 1. Isabella of Burgundy 2. Joan de Lalaing |
| House | House of Châtillon |
| Father | John I, Count of Penthièvre |
| Mother | Margaret de Clisson |
Olivier (died 28 September 1433) was Count of Penthièvre and Lord of Avesnes from 1404 until his death.