Well considering every Russian Emperor post Peter the Great wasn't ethnically Russian..,
Practically all czars since 18th century were German origin. I think that Peter II was last purely Russian ethnic czar of Russia.
So ethnicity is like breed of dog? It's about 'blood', ain't it?
It's about how your ancestors mated?
And that makes you a Bulldog or a Spitz; a French or an Italian?
Oh, that makes the definition of 'ethnicity' so comprehensible...
Technically none of the Tsars were ethnically Russian, Rurik, the founder of the Rurikid Dynasty was a Swede. . .For reference, the Rurikids ruled Russia from the 700's to the Death of Ivan IV. . .
Well, then technically none of the Americans (in the USA) were/are ethnically American.
I mean, think for yourself - if 800 years of living in Russia didn't make the Rurikids 'ethnically Russian', how could 300 years living in the USA make anybody 'ethnic American'?
I think that on veins of Russians is more Uralic and Mongol blood than Scandinavian blood.
Genetically the Finno-Ugorians constitutes a
good share in the Russian 'blood'.
There was an extremely tiny part of the 'Mongol blood' even in the veins of the nomadic Golden Horde population, which was predominantly Turkic.
Speaking of the 'Turkic Golden Horde nomadic blood' in the veins of the Russians... according to the latest genetic researches it's close to nil, on the level of the statistical error.
As for 'Scandinavian blood' I don't have any data, but when my uncle sailed overseas (he was a sailor) the Scandinavians always addressed him in their languages, taking him for one of their own, which amused him greatly. Same with my brother, but rare as he's not a sailor and mostly stays in Russia.