In Greek mythology King Aeëtes of Colchis was the son of Helios, the sun god, and was thus styled the Son of the Sun. Jairazbhoy claims that this is proof of Black influence.
This king Aeetes who ruled at the mouth of the Phasis was given the epithet 'son of Helios.' He was thus 'son of the Sun,' which is the exclusive title in antiquity of the Pharaohs of Egypt.
R. A. Jairazbhoy, “Egyptian Civilization in Colchis on the Black Sea,” in African Presence in Early Asia, eds. Runoko Rashidi and Ivan Van Sertima (New Brunswick: Transaction, 1988), 61.
Now it's true that the Egyptian title dates back to 3500 BCE and thus predates evidence of its use in other cultures; however, it was certainly not "exclusive" to Egypt or its pharaohs in "antiquity."
This is not new information. It has been known since the late nineteenth century.