I've noticed this since I started playing ESO. If you just search "Caldwell" here on the forums, thousands of results come up. You see it in game as well. Is it just a common typo? Was Cadwell's name "Caldwell" in an early version of the game? Or is it because it is actually a real surname more common than without the L? Just curious

Either way, he is a great character, and voiced perfectly by John Cleese no less!
Total Champion Points: 1000+
Main Character: Ithaera - Stam DK, Nord, Female, DD, Werewolf.
Rothelnog - Stam NB, Orc, Male, DD, Werewolf.
J'Xena - Mag DK, Khajiit, Female, DD, Werewolf.
Dances-With-Frost-Dragons - DK, Argonian, Male, Tank, Werewolf.
Raziel The Paradox - Mag TP, Dark Elf, Male, DD, Vampire.
Swims-Through-Starlight - TP, Argonian, Female, Healer, Werewolf.
Glaicean Mag Ward, High Elf, Male, Ice DD, Werewolf.
Hjurne Hircine's Forsaken - Sorc, Redguard, Male, PvP DD, Werewolf.
My Total Free Werewolf Bites: 400+ (Ask me about bites if you need one!)
Playing since July 2015!