Gee, I thought the Egyptians were black. That’s what they teach you in politically corrected public high school.
Egypt kept conquering Nubia and it was common to bring hostages to Egypt, where they were raised with foster families. Some intermarried. There was also large scale trade between the countries leading to more intermarriages with races outside Egypt proper. So there are many ancient Egyptians depicted with black features, and many more without.
Ptolemy was the half brother of Alexander the Great. They were Macedonian or northern Greek.