Jandaveos was the beloved god of the elves of Termana, until the war with the titans where he died. He was so utterly destroyed that its name itself was forgotten. The elves being cursed by the titan Chern lost their hope, their fertility and their immortality, and they renamed themselves the forsaken elves.
Jandaveos himself was resurrected by the priest Vladawen the titanslayer after a long quest related in the dead god trilogy. He was revealed as a benevolent god (chaotic good) and rejoined his people to recreate the mighty elven empire, renamed Divine Empire of the Rose. Those who followed him saw their curse removed, but a lot of the forsaken elves could not abandon their evil ways.