Manannan

An old, twisted and evil wizard who had the custom of kidnapping infant boys and training them as his slaves.

His first slave, when turned 18, was captued by him in his secret magic lab. Fearing that he would use his own spell against him, he killed him and picked another infant. To prevent this danger from happen again, by choice killed all of his servants as they reached age eighteen and picked another.

For many years he reigned as the absolute ruler of the land of Llewdor, and under his leadership brigands, thieves and the like prospered. Manannan made a terrible error, however, in the choosing of his final servant, a baby boy who he named Gwydion. Gwydion was able to escape the clutches of Manannan, and learning several magic spells, was able to turn Manannan into a cat.

Mordack then, captured the royal family in order to try to get Alexander to reverse the spell, but the poor Prince had no idea how he could do it. Once Graham travelled there to rescue his family and was inside Mordack's castle, Manannan (the cat) tried to get in his way. Graham gave him a fish and then captured him a bag.

After the defeat of his brother Mordack at the hands of King Graham of Daventry, Mananan was never seen or heard from again and his fate remains unknown. Derek Karlvaegen hopes Manannan starved to death inside the bag, he certainly hopes he didn't escape.

His home in Llewdor was later occupied by Karlvaegen, from where he tried to communicate with Earth.

In KQ2 (AGDI) he is said to be the Brother of Mordack and Hagatha. However this is strongly implied to be a connection to the Black Cloak Society.

Real world
Manannan was a celtic god son of Lir (usually known as Manannan MacLir) and god of sea and weather.