holy shit, I'm still laughing. Russia is multi-ethnic, you potato. And yes, it is full of Slavs, among others. Yes, "Rusy" also refers to a hair color, and Moscow is absolutely named after some Ugric word for water. Just like North America is full of Indian names and Anglo-Saxon England is full of Celtic names.
On the other hand, Ukraine also has a lot of mixed up DNA, from getting fucked by the Turks for so long, and fucked by the Poles and Lithuanians, and Mongols, and everyone else. Shit, if you want to work from the beginning we can start with the Scythians and Sarmatians, the Goths (Ukraine was their homeland, Oium) the Huns, the various Turkic tribes, some of which were blonde and blue eyed, others which were mongoloid. The Slavs....the list goes on. It's like the Sicilian scene.