All of these should be pretty self-explanatory. If a key name isn't, then it probably isn't on your keyboard.
Any graphical character on the US-101 keyboard may be named simply by that character, except for #, which is called "Hash". Note that if (like Hash) you have to push a shift key to get the result, then this key will never register as a gesture. (Hash, for instance, would show up as the independent events "LeftShift" and "3".)
The nongraphical characters with special names are as follows: