Jessant-de-lys is a heraldic term denoting a fleur-de-lys issuing out of any object. It is most frequently seen in conjunction with a leopard's face, meaning in heraldic language the face of a lion.
Seal of William de Cantilupe (died 1239) showing on an escutcheon three fleurs-de-lys
Seal of Bishop Thomas de Cantilupe showing arms of Cantilupe ancient on each side of the bishop.
Image: Jessant de lys Lys Erect
Image: Jessant De Lys
William de Cantilupe (died 1239)
William I de Cantilupe 1st feudal baron of Eaton (Bray) in Bedfordshire, England, was an Anglo-Norman royal administrator who served as steward of the household to King John and as Baron of the Exchequer.
Seal of William de Cantilupe showing his arms Gules, three fleurs-de-lys or