Joel is the second of the twelve minor prophets and the author of the Book of Joel. He was the son of Pethuel. His personal history is known only from his book. The name Joel means "The Lord Is God". On the Eastern Orthodox liturgical calendar, his feast day is October 19.He is commemorated with the other Minor prophets in the Calendar of saints of the Armenian Apostolic Church on July 31. Wikipedia
The definitive Wikipedia entry for Joel. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Joel_%28prophet%29