…or we're just running out of names that are puns of "C" for C++ successor languages, so things that were deprecated a decade ago are now fair game?
This trend of not putting any thought into what you name your language/framework/application is fairly new and shows serious laziness. Google's team should have done better. Naming things is hard but if you're going to make something worth people's time, it's worth spending a little more effort than they did.
Edit: it appears that Nitrogen and Phosphorus are already used by Lisp dialects.