Eustace[1] d'Aubrichecourt or d'Abrichecourt or d'Auberchicourt, of the Auberchicourt family, (c. 1334 in Bugnicourt - c. 1373 in Normandy) was a French knight who enlisted in the service of the English during the Hundred Years' War.
[3] On 23 June 1359, Eustace commanded the Anglo-Navarrese army which was defeated by the bishop of Troyes Henri de Poitiers near Nogent-sur-Seine.
He settled in the county of Rethel in Attigny, and from there roamed and plundered Champagne going to the vicinity of Laon (Épernay, Vertus, Château-Thierry, La Ferté-Milon, etc.).
The Treaty of Brétigny in May 1360 put an end to these expeditions, the English and their allies had to leave Champagne.
In 1364 he took part in the battle of Auray where Charles de Blois was killed, then he was appointed captain of Bouchain.
She was daughter of William V, Duke of Jülich, niece to Queen of England Philippa of Hainaut and widow of John, 3rd Earl of Kent.