- Count of Longueville.
- Second son of Robert II du Guesclin, Lord of la Motte-Broons, and his wife Jeanne de Malesmains. Brother of Bertrand du Guesclin.
- Fought against the English in Brittanny, Fladers and Castile.
comde de Lomgavilla
Chronicle entries in which Olivier du Guesclin appears:
Crónica de D. João I, part 2, ch. 109