I have a Calking that will come out of his hide if I tap on his tank
I think this might be because they can feel the vibrations of it. Not that I'm against the theory of snakes being able to hear. Just wanted to point out that this doesn't really prove they can hear.
About the original topic, I name my snakes. Or, at least, i'm in the process of naming them. I've named 2 out of 6, so there's a start at least. I don't name the frogs, because there are so many, and you can't tell them apart anyways.