By 1780, the Carolina Upcountry had an estimated population of more than 250,000, predominantly Scots-Irish Presbyterians but with significant numbers of other Protestants from Great Britain. The Scots-Irish settled in a dispersed community pattern denoted by communal, clannish, family-related groups known as "clachans", much the same as in Pennsylvania and Ulster, Northern Ireland. The clachans developed around the Presbyterian Kirks, or meetinghouses, and became the forerunners of the congregations. In York County, the ""Five B" churches", all Presbyterian—- Bethany, Bethel, Bethesda, Beersheba and Bullock's Creek—- are the county's oldest.