Not much is written in the books about the Jinn besides Mr. Beaver saying the Witch is half Jinn. Considering the White witch originates from Charn, it could make sense that Jinns don't really exist in Narnia at all, but in Narnia too are just a mythological species, although the Jinns are probably similar to the mythological Jinns we know.

I don't recall the Jinn ever appearing in the series, unless there are some among the White Witch's creatures. I don't think he says anything else about them. Yes, they were genies, but not in the modern sense of the word. I'm not entirely certain of their history, but I have been told that the word genie is a variant of the word jinn. Yes, I think it is a good guess that Witch got her powers from the Jinn side of her family tree. The royal family of Charn were all magicians. I think Lilith was only one of the Jinn, but I'm not sure. If you want to know more about Lilith, I suggest reading George MacDonald's Lilith. I think Jadis' father was the ruler of Charn before her.

Hope that helps.

hmmm.....the only mention I see if jinn in the books is Mr. Beaver's mention of WW being jinn......I don' think it's anywhere else!

Nope, never mentioned again. Just another species living in Narnia. I do not think that Jadis being part jinn automatically makes all jinn evil. It may simply explain her tall stature and long lifespan, among other traits.

Actually one species of jinn is mentioned in LWW. They are called Efreets, and as I understand they are a race of fire jinn.

We talk a little bit about them and the rest of the Witch's army in the Narnia & Mythology discussion here:

viewtopic.php?f=8&t=1316

Personally I assumed that Lilith found her way into Charn and started a race of Jinn there. -Perhaps a race that rivaled the indigenous Giant population.

In the hall of images I felt that when the faces of the Kings and Queens start to turn nasty, that was the point in history when the giants started mixing with the jinn.

I know this sounds crazy but what is a Jinn? Is it described in one of the books?

Jinns are not described in the books. They are actually from Arabian mythology and are closely related to genies. As I understand it, they are like daemons from European mythology, -neutral spirits that would do magic for people if they could enslave one.

I was thinking that Narnia is part of the land that Charn was and that some of the demons that were already in Charn WW resurrected them. I do sort of remember WW calling up things as if if she was calling up souls. What if Jinns were demons in that world?

Narnia is most definitely NOT a part of Charn. They are completely different worlds. Saying such a thing is like saying that Narnia, or Charn is a part of our world. Remember that Charn was destroyed at the end of MN, it therefore couldn't be a part of the Narnian world. That is not to say, however, that the witch couldn't have called up the long dead spirits of her world into another world.

I do sort of remember WW calling up things as if if she was calling up souls.

I couldn't remember the White Witch calling up things, so I went and looked it up. Are you thinking of this part? The wolf has just come and told the Witch that Maugrim is dead and urges her to fly (meaning she should flee, not that she should actually fly away). "No," said the Witch. "There need be no flying. Go quickly. Summon all our people to meet me here as speedily as they can. Call out the giants and the werewolves and the spirits of those trees who are on our side. Call the Ghouls, and the Boggles, the Ogres, and the Minotaurs. Call the Cruels, the Hags, the Specters, and the people of the Toadstools...." LWW Deep Magic from the Dawn of Time
In the BBC the Witch does actually call things up. It's really creepy because she gets this really weird expression on her face and creatures come out of the ground and out of caves and move towards her.