What should I name the wise old man of my story?

Okay so it's a story that has a lot to do with astrology, but not just the numberology and zodiac stuff, it's about witches who vanquish demons and what not. He's the total wise old man. I guess he's kind of like Dumbledore... ha ha! (It's nothing like Harry Potter, I promise... I've never even read the books or seen the last couple of movies... -Harry's getting old -__- -). But he's wise and gentle and has that kind of character. What should I name him?