I've been told quite a few times that I look Russian, which is strange as I'm very English and all my ancestors for at least the last few hundred years were from the British Isles somewhere. I can only assume its because I'm pale?
My husband gets this all the time, and for the same reason (he is predominantly English, as far as we know, but very, very pale (burns on a cloudy day in winter) and with very light hair). Apparently this means he looks like the Russian upper class. We go to a Russian church (Orthodox) and people have approached him to ask if he speaks English. Also, upon first meeting nearly everyone is surprised that he is a convert. No one is surprised that I am (mostly Italian and look it).
It's not just the Orthodox, though. His last job was as a pharmacy tech at a grocery store pharmacy that served, among other customers, the Orthodox Jewish portion of the town (primarily Russian Jews). It was right next to an apartment complex called Shalom Towers, to give you an idea

. One of their older customers asked for him as "The Russian One" and refused to take the word of DH's coworker,
who was actually a Russian Jew, that he was not Russian and definitely not Jewish. When DH came over and confirmed both these things the customer said, "Well, he has a Russian soul!"