You are right Sheila. The exactly name of the chevalier Bayard is
"Pierre de Terraille seigneur de Bayard".
But, it is possible that one descendant of the "chevalier Bayard" take a title with a surname "Baron Bayard" or perhaps one of the Bayard from my familly migrate in Louisiana or a Canadien (like Banhliac dit Bayard) migrate with the great "derangement". We have "beaucoup de travail" befor keep the verity.