Enclosures of this kind are among the most common and least celebrated of Irish archaeological monument types, ranging from prehistoric ceremonial sites to early medieval farmsteads surrounded by a bank and ditch, known as ringforts or raths. The name Rathduff itself contains that history: "rath" is the Irish word for a ringfort, a circular earthwork enclosure typically dating from the early medieval period, roughly 500 to 1200 AD, which served as a defended farmstead for a single family or small community. "Dubh" or "duff" in Irish means dark or black, which may refer to the soil, the vegetation, or some long-forgotten local association.