It was so long ago pretty much 100% of anybody from Europe has DNA from those times all mixed up. The attempts to keep bloodlines “pure” was mostly about controlling money and power and resulted in horrific genetic defects being exacerbated such as seen in the famous Hapsburgs.
I am of the same mind. Gabriel who impregnated Mary (one of the books that got suppressed by the Catholics) was as well. My feeling is they are all human-like ETs of various kinds. My own UPG on talking to some entities, not just the archangels is they’re from all over, some are Greys, some are Arcturian etc. etc., some are Earth based (Djinn/fae), some are egregores (deified or personified cities, kings and forces of nature), and all in all it’s a very mixed bag.
The team at Farsight are of the opinion that the Egyptian gods were reptilians which is fun too. 
Yes, and also blood and such - hence “vampirism”… Damian Echols talks about this in his videos and he’s a freemason, so it may be a thing taught in that cult. I had it linked somewhere…yeah, here.
I haven’t seen a better explanation of humanity and it’s history yet than the ancient aliens theory, yet. As working models go it seems to play out well.