Killeenagalliagh, in the townland of Ballinvoy in County Mayo, carries within it two layers of meaning that point toward something quietly significant. The first element, killeen, derives from the Irish cillín, referring to a small, unconsecrated burial ground, typically used for unbaptised infants or others excluded from formal church burial. The second element, galliagh, likely relates to the Irish cailleach, meaning old woman or hag, a figure woven through Irish folklore as a supernatural being associated with landscape, winter, and ancient places. A burial ground named for a hag is not the most common combination, and it suggests a site where folk memory and pre-Christian association have settled into the land over a very long period.

Cillíní are found throughout Ireland, often at field margins, on the edges of townlands, or near water, placed deliberately outside the sanctified ground of parish cemeteries. For centuries, Canon Law barred unbaptised children from consecrated burial, and so communities quietly maintained these separate, unofficial plots. The practice continued in rural Ireland well into the twentieth century, and many cillíní remain unmarked and relatively undisturbed, known locally but rarely signposted or formally acknowledged. The presence of a cailleach reference in the place name at Ballinvoy deepens the picture, hinting that the site may have carried significance well before Christian burial customs shaped its use, though without further excavation or documentary evidence, that remains a matter of reasonable inference rather than established fact.