I don't think evidence of neanderthals blood type has ever been established, thus far.
...I don't think the neanderthal as he lived is to be underestimated. This group survived for the longest time in a very harsh climate. Perhaps they were a lot smarter than we gave them credit for.
I mean it would be cool to be part alien or nephilim. But I have my doubts, even if I'd love to believe in these theories. I'm B negative by the way and have an IQ of 135. I think 210 is bogus. Geeee anybody with that IQ should be in Harvard studying rocket science.
Actually I just read an article on this last week, about Neanderthals having Rh- blood. They were also supposedly red-haired and with light eyes. Couple that with the fact that the Pyrenees are a hotbed of Neanderthal evidence (Basque, anyone?) and I think you have some connectable dots there.