Note 223 — Chapter IV · OF THE DIFFERENT KINDS OF CARDS AND THE MARKS OF THE SUITS.
Reading edition
Mons. Duchesne thus accounts for those cards being called Atous: "Ces cartes sont dites a tutti, à tous, c'est-à-dire supérieures à toute autre, et n'appartenant à aucune couleur." In other games at cards, the French Atout has the same meaning as the English Trump.