Why is 1 a in playing cards?

There are two theories about the origin of poker: ancient Egypt and ancient India. At that time, it was a divination card, which was also a tarot card. The original tarot cards were composed of numbers and characters. J is jack, that is, knight; Q is QUEEN, that is, the queen; K is king, that is, king;

A is the first one. The "a" in playing cards refers to the English word ACE, which means

Noun (short for noun) [C]

1. (of cards, dice, etc.). ) 1; Point card, point card

2. Score (in tennis, etc.)

3. A talkative person, a famous hand and an outstanding person.

a.

1. First-class, outstanding

So the first letter of this word stands for card 1!