The Cornish form of this name, Jennifer, has become popular in the English-speaking world.
The French theologian Jean Calvin (1509-1564) and the philosophers Jean-Jacques Rousseau (1712-1778) and Jean-Paul Sartre (1905-1980) are well-known bearers of this name. It was also borne by the German-French Dadaist artist Jean Arp (1886-1966).
Although this name was used by Jews in the Middle Ages, it was not typical as an English Christian name until after the Protestant Reformation, being common among the Puritans.
As an English Christian name, Levi came into use after the Protestant Reformation.