In Irish, townland names beginning with "Fearann" generally indicate a landholding or territory, and the second element here has prompted more than a little speculation over the years. Whatever the etymology, the ground itself holds something older than any name: a ringfort, known in Irish as a rath, the circular earthwork enclosure that was the dominant form of rural settlement across Ireland during the early medieval period, roughly from the fifth to the twelfth centuries.

Raths were typically formed by one or more banks of earth, often accompanied by an external ditch, enclosing a space where a farming family would have lived, kept livestock, and stored food. Tens of thousands of them survive across the Irish landscape in varying states of preservation, making them among the most numerous archaeological monument types in the country. The one at Farrandoctor is recorded as a monument of this class, though detailed information about its current condition, dimensions, or any features specific to this particular example remains limited in the available record.

Kerry as a county retains a remarkable density of early medieval earthworks, many of them sitting quietly in farmland or on hillsides where they have escaped serious disturbance. A rath in this landscape would have commanded a view over surrounding agricultural ground, its raised bank serving as much as a social marker and boundary as a defensive structure. Without more specific documentation for this site, the monument is best approached as part of that wider pattern, a surviving trace of the farming communities who shaped the Kerry countryside long before the arrival of later lordships, plantations, and the modern road network that now passes nearby.