When PBS was doing a program they scanned the camera over Tuts DNA. Someone recognized it as Irish. More research revealed that Tut was related to half of present day European men. Another article said that Tut’s parents were his brother and sister. Lots of strange things.
The marriage of close cousins and even siblings was not unusual in some Egyptian Dynasties. Saudi Arabia still allows first cousins to marry. Of course Saudi Arabias incidence of rare and debilitating genetic disorders is way higher than that of other countries