My mother is from Ireland and I’ve visited there once. Have alot of family from and still living In Ireland. All of us are proud of our Irish Heritage. I’ve heard the term Black Irish. And heard basically the same theory. My hair is naturally black, skin very fair, lots of freckles, and brown eyes. Most cousins, different grandfather, are all red heads with green eyes. Have heard this is because my grandfather descended from ‘Black Irish’ spaniards and cousins did not.