Coat of arms of the lord of Arlay (red shield with gold bend).Coat of arms of the lord of Chalon (red shield with gold bend) and prince of Orange (gold shield with blue bugle); over all the (claimed) county of Geneva.
The House of Chalon-Arlay was a French noble house, a cadet branch of the House of Ivrea. The founder of the house is John I of Chalon-Arlay, fifth son of John, Count of Chalon. When John III lord of Arlay married to Mary de Baux, princess of Orange, the House acquired the principality of Orange.
John III of Chalon-Arlay lord of Arlay, married to Mary of Baux princess of Orange. Thus the principality of Orange passed from the House de Baux to the House of Chalon-Arlay. Mary's mother was Jeanne, daughter of Amadeus III count of Geneva.
Louis II of Chalon-Arlay prince of Orange. After the last count of Geneva from the House of his mother Mary, Louis II claimed the county but failed to acquire it.
Heraldic shield of the house of Chalon, cadet branch of the lords of Arlay. They eventually succeeded to the undifferenced arms as well as to the principality of Orange.[2]
Heraldic shield of the house of Chalon of Orange. The 1st and 4th quarters show the arms of Chalon-Arlay (Gules a bend Or), the 2nd and 3rd the princes of Orange (the bugle). The blue and gold cross is the arms of Jeanne of Geneva, who married one of the Chalon princes.[3]
Arms of Louis de Châlon (1448-1476)
Arms of Philbert de Châlon, Prince of Orange
Arms of Rene of Orange-Nassau-Breda (1530-1544) : overall in the center as an escutcheon is the quartered arms of Nassau and Vianden/Breda.