The Byzantine Greeks introduced the name Rus - it means Russian.
LOL!!!! What no mention of Varangians or Finns? Since you're not lucky enough to be Slav and Eastern Slavic history is not your forte, all I can do is recommend a library or go to a good website with a timeline. The term Rus was well used before the introduction of Christianity.
Destro,
2nd request - Please take your nonsense to one of the teen chat lines. Rus is not Russian . Kiev and its Ukrainians was the leading city in the area - called the City of Golden Churches - This was when Moscow was a podunk trading village.
Rus is derived from the norse term for "Row".