In most of the stories of the X-Men I've read, and in the Animated versions, and the movies she is referred to as Jean or Jean Grey, less often as Phoenix.  Why is that?  When I used to read X-Men and X-Men related comics (this was back in the 1980's) I can only remember her called Jean.
I can understand that Marvel Girl is a rather dated and silly name, but has she taken a lasting code name since Marvel Girl or Phoenix?
	
		
			
		
		
	
				
			I can understand that Marvel Girl is a rather dated and silly name, but has she taken a lasting code name since Marvel Girl or Phoenix?
				



