The correct way to ask "What is your name?" in French is:
"Comment vous appelez-vous?"
Let's break it down:
* Comment: How
* vous: you (formal, plural or singular)
* appelez: call (present tense of the verb "appeler")
* vous: you (formal, plural or singular)
Therefore, "Comment vous appelez-vous?" is a polite way to ask someone their name in French, whether you are addressing one person or multiple people.