Is/was it possible that Cleopatra VII of Egypt had got some egyptian blood in her, besides greek?
It’s possible but by no means likely. We don’t know for certain the identity of her grandmother. Her parents were Ptolemy XII and Cleopatra V, who were both the children of Ptolemy IX. We know that at least one of them, possibly both, were not the child of Ptolemy IX’s wife-sister Cleopatra IV, but of a concubine. (If they were both the children of a concubine, we don’t know if they were children of the *same* concubine.) Whoever that concubine was, most modern sources will call her “the Greek concubine”, but it’s also possible that she was Macedonian, Egyptian or even Nubian. As to why the Ptolemaic dynasty married within itself for three hundred years, there are a lot of reasons: 1) The big one is that Ptolemy II, the second Ptolemaic Pharaoh, revived the old Egyptian Royal custom of royal siblings marrying each other when he married his sister Arsinoe II. This was probably done for political reasons, to endear the Ptolemaic dynasty to the Egyptian people. The Greek world considered
