I think it is better known as "Developer Evangelist" or "Developer Relations".
Yes. But what exactly does it mean? I thought maybe it is "very qualified developer" but I read comments here, and doubts grow, maybe I understood it wrong.
It's just someone who sells a concept or technology to companies, really. Knowing how it works is a plus, but it's not like there haven't been very prominent tech evangelists who knew next to nothing about tech. If you can explain what people gain from using the tech in a good enough way you're pretty much done.
Yes. This reminds me of the Alan Perlis: "Above all, I hope we don't become missionaries. Don't feel as if you're Bible salesmen. The world has too many of those already."
So the evangelist would be in the marketing department?
OK, i searched the internet, and found explanations.