If books are all you got, then I pity you because they teach you nothing, you go off talking about this or that when you really have no idea what you are talking about, you only think you do. Jean is a man's name, a MAN, Monsieur Baron had it completely right, Jean is a French man's name, the French form of the name John. The name comes from the Hebrew Yohanan, which went into the Latin Johanne. The name means Yahweh is Gracious and in every culture it is a names name, the closest female equivalent is Jeanne as M. Baron rightly pointed out.
In English countries the name of Jean, but there is a different pronunciation, something as an English speaker you should know, words can be spelled the same, but have different pronunciations that carry different meaning.
As I am from a Francophone country, guess which one applies. ן