That gap in the record is itself telling. Enclosures of this kind are among the most common yet least understood features of the Irish countryside, ranging from prehistoric ceremonial boundaries to early medieval ringforts, the latter being roughly circular earthen or stone enclosures that once served as defended farmsteads. Without further detail, Brownstown's example sits in that ambiguous category of known but not yet characterised.

The townland name Brownstown points to a post-medieval layer of settlement, likely reflecting an English or Anglo-Norman settler surname applied to a landholding during the plantation period or earlier waves of Norman colonisation in Kilkenny, a county with particularly dense Norman influence from the twelfth century onwards. Whatever the enclosure's age, it would have predated that naming, and may have been a feature of the land long before any Brown family arrived to give the townland its identity. Kilkenny's landscape is densely archaeological, with earthworks, ringforts, and field boundaries from multiple periods surviving in varying states beneath and alongside its farmland.