"Merlin you idiot. Your name is Merlin and my name is Arthur. Did you not think it was important that you could not remember such important names?" he means his own name mostly, "that means that along with kidnapping us they also tampered with our minds. It must be the work of magic."

A bit begrudgingly, "if it makes you feel any better, I cannot recall the names of any of the Kings, Lords, Ladies, or kingdoms, besides Camelot." he tried to test his own knowledge of names after Merlin's confession, he wasn't happy about the outcome,