Joker (playing card) 6 Jokers (3 different pairs) in a 52-card French deck. German Rummy uses 2 packs of French playing cards, with 3 Jokers per pack. The Joker is often compared to "(the) Fool" in the Tarot or Tarock decks. They share many similarities both in appearance and play function. In Central Europe, the Fool, or "Sküs", is the highest trump; elsewhere as an "excuse" ("L'Excuse") that can be played at any time to avoid following suit but cannot win. Practitioners of cartomancy often include a Joker in the standard 52-card deck with a meaning similar to the Fool card of Tarot.
Jack (playing card) As early as the mid-16th century the card was known in England as the knave (meaning a male servant of royalty). Although "jack" was in common usage to designate the knave, the term became more entrenched when, in 1864, American cardmaker Samuel Hart published a deck using "J" instead of "Kn" to designate the lowest-ranking court card. The knave card had been called a jack as part of the terminology of the game All Fours since the 17th century, but this usage was considered common or low class. However, because the card abbreviation for knave was so close to that