Countess of Nevers, Auxerre and Tonnerre
Agnes I (1170 – in 1192 or 1193 in Mailly), was the reigning Countess of Nevers, Auxerre and Tonnerre between 1185 and 1192. She was the daughter of Guy, Count of Nevers, Auxerre and Tonnerre, and Mathilde de Burgundy, dame of Montpensier.