John V de Pierrepont

John V de Pierrepont (c. 1300–1346) was Count of Roucy, Braine and Rochefort, succeeding his father John IV and inheriting Braine through his mother Jeanne de Dreux.

In 1320 he went as a French royal envoy to Flanders to mediate between Count Robert III and his son Louis of Nevers. In October 1339 he served in Philip VI's army facing Edward III at Buironfosse near Saint-Quentin, the first standoff of the Hundred Years' War.

He was killed at Crécy on 26 August 1346. With his wife Marguerite de Bommiers he left sons Robert II, Simon and Hugues.