[looks at Storm]
[looks at Xavier]
What do they call you? "Wheels"?
Most comic book characters have names which are so befitting them, or are so obvious, that you can only say, "Duh" to their origin. Spider-Man? Superman? Batman? Iron Man? Cyclops? What else would you even think of calling these characters?
Nathan Summers' codename of Cable seems a little less obvious though.
Regarding the creation of Cable, Rob Liefeld has said,
I was given a directive to create a new leader for the New Mutants. There was no name, no description besides a 'man of action' the opposite of Xavier. I created the look, the name, much of the history of the character. After I named him Cable, Bob suggested Quinn and Louise had Commander X.
But where does the name Cable come from? Either an in-universe or out-of-universe answer is acceptable here if it sheds any insight.