Excerpt: A majority of the early settlers on the Appalachian frontier were immigrants from Lowland Scotland or from Northern Ireland (the Scots-Irish, who descended primarily from Lowland Scots).
Olson, Ted. 2017. Scottish Culture: Scottish and Scots-Irish Music. The Crooked Road's Mountains of Music Homecoming: The Official Homecoming Guide. 32. http://mtnsofmusic.com/wp-content/uploads/2017/04/MOMH_ProgramGuide_FINAL-lowres.pdf