Robert of Artois
Robert of Artois (1326–after 1347) was the fourth son of Robert III of Artois and Joan of Valois, King Philip VI's sister. When his father was condemned for forged documents and fled to England in 1334, the royal government seized his children.
Robert was imprisoned in 1342 and later transferred with his mother and brother James to Château Gaillard. He died in captivity after 1347, probably during the Black Death, leaving no descendants.