From the Hebrew name יוֹאֵל (Yo'el) meaning "YAHWEH is God", from the elements יוֹ (yo) and אֵל ('el), both referring to the Hebrew God. Joel is one of the twelve minor prophets of the Old Testament, the author of the Book of Joel, which describes a plague of locusts. In England, it was first used as a Christian name after the Protestant Reformation.