Such sites, sometimes associated with a ruined church or an early medieval settlement, often bear the quiet, unlabelled quality of places that have simply been there longer than anyone can comfortably account for.

Grenan itself sits in a part of Kilkenny with deep layers of early Christian and medieval activity, and graveyards of this type frequently mark the site of a long-vanished ecclesiastical foundation, perhaps a small church or a monastic cell that left little above ground. Without more detailed records available, the specifics of this site, its extent, any visible grave markers, or its likely period of use, remain to be established.