It becomes apparent before even the midway point in The Eye of the World by Robert Jordan that the characters of Moiraine and Lan have a variety of names they use in different locations to hide their true identities.
Why do they then use their real names from the get-go in coming to the Two Rivers? Is there a canon explanation for this.
The obvious out-of-universe answer is the author didn't want to change the names of two of the major characters fairly early in the book as Tolkien did with Aragorn -- but is there more to it?