John of Artois, Count of Eu

John of Artois (1321–1387), called Sans-Terre (the Landless), was the son of the disgraced Robert III of Artois and Joan of Valois, Philip VI's sister. His father's treason cost the family its lands, and in 1334 Philip shut John and his family in Château-Gaillard.

John II freed him in 1350 and in February 1351 gave him the County of Eu, recovered after Constable Raoul de Brienne's execution; the Artois family thereby joined the royal party against the Navarrese. As royal lieutenant in Normandy he helped seize the King of Navarre's lands there.

He was at Bordeaux when the king was captured at Poitiers in 1356, and in 1357 carried truce letters to Paris. He served Charles V and led the rearguard at Roosebeke in 1382.