They’re not like those jaunty Irish surnames that kind of jump out and hit you in the face–no way you could see Finnegan or Donovan as anything else. But Scottish surnames, somewhat more subtly, have affected American nomenclature to a surprising degree.
Many that could pass for Irish or English are actually old Scottish clan names, and several have long been accepted as first names in this country–a list that includes Allan, Bruce, Douglas, Leslie, Mitchell, Murray, Stewart, Gordon, Lindsay, and, of course, Scott.
Scottish surnames are divided into two groups: Highland and Lowland. Highlanders didn’t use fixed family names until relatively late–until the 1700′s a man was often designated by his father’s name or would adopt the last name of a laird to curry his favor. It was the Gaelic Highlanders who used the prefix ‘Mac‘ to denote ‘son of”.