I've noticed a lot of McBrides in Ayrshire, Scotland. I always thought that "Mc" was Irish and "Mac" was Scot. My great-grandfather was a McBride. He, my grandmother, and Dad were very good with horses, which I always thought was an Irish trait. Also, I read years ago that Spanish sailors shipwrecked on the Irish coast and that is why there are dark haired Irish, as well as red haired Irish. Is that what you've been taught? It's interesting. I should read more about your part of the world.