Buncle is a name derived from which medieval fortress?
Buncle: Buncle is a Celtic derived surname originating from Bonkyll Castle, Berwickshire, Scotland. Bonkyll Castle: Bonkyll Castle (also variously spelled Bonkyl, Boncle, Buncle, Bunkle or Bonkill) was a medieval fortress situated in the eastern Scottish Borders of which little remains.
Bonkyll Castle