Overall, the Scots-Irish settlement of British Colonial America, overwhelmingly between 1717 and 1775, has largely been determined by numerous overlapping forces that had ultimately resulted in the migration of significant numbers of Scots-Irish to British Colonial America, and a significant majority of the settlers were originally associated with Lancaster, Pennsylvania, and the surrounding area. However, unlike the German settlers to the Lancaster area, including Amish and Mennonite communities, the Scots-Irish were often identified as frontiersmen by tradition and many were pushed to the frontier regions, including around Washington County, Pennsylvania, and into the western portions of Maryland, Virginia, North Carolina, and even South Carolina. The Colquhoun family, which has largely evolved into the Calhoun (along with numerous alternate spellings) family, has largely represented the area in Upstate South Carolina around Abbeville, including by way of the notable John C. Calhoun descendant of the Scots-Irish.
