The name Killeely derives from the Irish "Cill", meaning church, pointing to an early ecclesiastical foundation, though the precise dedication and the full history of the site remain only partially documented. Ruins of this type are scattered across the west of Ireland, often marking the spots where early Christian communities gathered long before the formal parish structures of the later medieval church took hold.

Without detailed records currently available for this particular site, the broader context offers some orientation. Churches bearing the "Cill" prefix frequently originated as early medieval foundations, sometimes associated with local saints whose cults have since faded from wider memory. Many such sites were in continuous use from the early Christian period through to the post-medieval era, with the standing fabric, where any survives, often reflecting later rebuilding over much older foundations. The presence of a named church in a townland that itself carries the ecclesiastical prefix suggests the site was significant enough to give the surrounding area its identity, which is itself a quiet indicator of former local importance.