I know the far south of Italy and I've come across "arugula" there. "Eruca" is the botanical Latin name of the genus that includes the plants we call rocket. Unless you're in a posh restaurant that's pretending to appeal to the cognescenti only, it's "rocket" this end. Unfortunately, unless you grow your own (incredibly easy), the rocket we get here in supermarket bags is insipid and just about useless.

I have a couple of lovely recipes that use rocket in a non-salad context. We'll see how it goes.