The Artois were another branch of the Frankish royal family who were at various stage dissenting voices in the governance of the Frankish Nation.
One of their number Blanche d’Artois distinguished herself by marrying members of both the Plantagenet and Navarese royal families, making Henry of Grosmont a cousin of Charles II of Navarre.
The Artois also married into the Foix family , meaning that both Gaston de Foix and Ximene Trencavel are both relatively closely related to both the English and French royal families