I read something a few years back about a man in England who discovered his paternal ancestry came from a place in Croatia where the same surname is still found--evidently he had an ancestor from there who became a mercenary in one of the wars and eventually settled in England.
My father, when we lived in NJ told me about a group of people living in the NJ, NY, PA border area (the hills) who were called “Jackson’s Whites”. He said they were a mixture of run away Negros, Indians, and deserting Hessians from during the American Revolution.