Yesterday, I was reading some articles about the history of the word "Россия".

But I got confused! because in one of them, it was written that the word "Россия" is from сакрального языка, and it means "cветлый". And somewhere else it was written that it is originated from the word "рос",... and lots of different explanations that were not related to each other.

Is there anyone who can tell me the origination of the words: Россия and русский?

Thanks in advance!!!