The name alone hints at something older beneath or around the burial ground, a pattern common across Ireland where early Christian and even pre-Christian sites were reused across successive generations. Graveyards bearing this prefix often occupy ground that was already considered significant long before the first headstone was placed.

The precise history of this particular site remains difficult to pin down with any certainty. What can be said is that Carrowcuilleen itself, as a townland name, contains the element "cuilleann", the Irish word for holly, suggesting the kind of quietly descriptive nomenclature that characterises much of the Mayo landscape. Small rural graveyards of this type frequently served local parishes or clusters of families over many centuries, accumulating layers of use that formal records only partially capture. Some in the region preserve traces of earlier enclosures, the circular or oval boundaries that betray a origin as a lios or cashel, a stone-walled farmstead of the early medieval period.