My husband is dark skinned, and has black hair, and is often mistaken for being Arab or Hispanic, by people of those persuasion. My son got a DNA test and his father’s side is only French and Celtic, and related to King Duncan. No native American or black.
My father is predominantly Irish as both of his grandparents came from Ireland but he had black hair when young. He was told he was black Irish, a trait that came from the Mediterranean area but had migrated to Ireland.
Wow, it is almost as if diversity is built into the genome by design.