If ever you have wondered how C.S. Lewis came up with the name “Aslan,” just this morning I stumbled across a letter that explains the origin of the name. Lewis wrote the letter to a child named Carol on January 22, 1952. It reads as follows:
It is a pleasure to answer your question. I found the name in the notes to Lane’s Arabian Nights: it is the Turkish for Lion. I pronounce it Ass-lan myself. And of course I meant the Lion of Judah. I am so glad you like (The Lion, the Witch and the Wardrobe]. I hope you will like the sequel (Prince Caspian) which came out in November.