Blackjack, formerly called Black Jack and Vingt-Un, is that the American version of the multi-player card game known as Twenty-One, whose ancestors would be the British version of the exact same game as well as the French variant of this Vingt-aux-Trident. The name Vingt-Un in French means" Twenty-one cards", so the game's title is derived from the amount of cards dealt out (twenty-one)