Caheraphuca translates loosely from the Irish as the fort of the púca, that shape-shifting spirit of Irish folklore, unpredictable and not entirely friendly to human visitors. That the site is classified as a cashel, a type of ringfort defined by stone rather than earthen banks, only adds to the atmosphere. Stone ringforts of this kind were typically built during the early medieval period, roughly between the fifth and twelfth centuries, and served as enclosed farmsteads for a single family or small community. They are common enough across Munster, but one bearing the púca's name is rather less so.

County Clare has a high concentration of such monuments, a reflection of both the density of early medieval settlement in the region and the durability of the limestone that was so readily available for construction. A cashel's enclosing wall, sometimes several metres thick, would have sheltered a household, its animals, and whatever small structures served as living quarters. The púca association embedded in the placename suggests that by the time local memory was attaching names to this particular site, it had already passed out of ordinary use and into the category of places best left alone after dark, the kind of spot that accumulated folklore the way old stones accumulate moss. Whether the name predates the monument's abandonment or reflects centuries of subsequent unease is impossible to say.