The religious symbolism in C.S. Lewis's Narnia books is well known and, in many cases, very clear: Aslan is Jesus, the Calormenes are a very stereotypical portrayal of Muslims, the Dwarfs may represent Jews, and so on.
What about the Telmarines, as seen in Prince Caspian? They rule over Narnia and banish the talking creatures and dwarfs, hags, etc. to the mere legends that they are in our own world. Do they represent anything in the symbolic Lewisian theology? Atheists, perhaps?