But that's not the name of a man, it's the name of a mountain! {...}"It is my...

But that's not the name of a man, it's the name of a mountain! {...}
"It is my name," Athos said calmly.
"But you said your name was d'Artagnan."
"I?"
"Yes, you."
"That is to say, someone said to me: 'You are M. d'Artagnan?' I replied: 'You think so?' My guards shouted that they were sure of it. I did not want to vex them. Besides, I might have been mistaken.