The one at Killernan is among the quieter examples, its details not yet fully documented in the public record, which itself says something about how many such sites exist across the country and how slowly the work of cataloguing them proceeds.

The tradition of holy wells in Ireland stretches back well before Christianity, rooted in the belief that certain springs possessed curative or protective powers. When Christianity arrived, the Church absorbed rather than erased many of these sites, associating them with local saints and incorporating them into the calendar of pattern days, annual gatherings at which communities would pray, walk a prescribed circuit around the well, and sometimes leave offerings such as rags or coins. Killernan, a townland in County Clare, takes its name from the Irish, most likely referring to a church or enclosure associated with a personal name, a pattern common across the west of Ireland where early ecclesiastical settlements clustered around water sources and fertile ground. The precise saint or dedication connected to this particular well is not currently recorded in available sources.