Eldad and Medad were distinguished not only by their prophetic gift, but also by their noble birth, being half-brothers of Moses and Aaron. When the marriage laws were revealed, all those who had been married to relatives by blood had to be divorced from them, so that Amram, too, had to be separated from his wife Jochebed, who was his aunt, and he married another woman. From this union sprang Eldad, "not of an aunt," and Medad, "in place of an aunt," so called by Amram to explain by these names why he had divorced his first wife, his aunt.