That name, Crann Cam, is the only surviving identity of a children's burial ground in the townland of Garranroe, a site that was marked on the first edition Ordnance Survey six-inch map of 1840 as a "Site of Old Graveyard" and then quietly disappeared from every subsequent mapping of the area. Places like this, known in Ireland as killeens or cillíní, were informal burial grounds used for unbaptised infants and others excluded from consecrated ground by Catholic canon law. They tend to occupy marginal land, field corners, or spots already freighted with older significance, and Crann Cam fits that pattern.

The antiquarian Thomas Johnson Westropp, writing in 1904 to 1905, linked the site to a place recorded as Kyle of Crancam, noting a possible connection to a location called Cromcon mentioned in a charter of Magio dated to 1185. By 1586, the townland appears in the Calendar of State Papers Ireland as Garranroo, in the territory of Cosmay. The Ordnance Survey Letters, compiled during the great mapping project of the 1830s, are more direct in their description, recording the site as a "Kyle or burial ground for children called Crann Cam, crooked tree, situated in Garranroe townland." The word kyle, from the Irish coill meaning wood or grove, suggests the place may once have been associated with a particular tree or stand of trees, lending the site a layered quality that reaches back well beyond the post-medieval period.

Because the site was dropped from OS maps after 1840, locating it on the ground requires some patience. The 1840 first-edition OS six-inch maps, which are freely available through the Historical Maps viewer on the Ordnance Survey Ireland website, remain the most useful guide to its approximate position within the townland. Garranroe lies in the barony of Coshma in County Limerick, and as with most cillíní, nothing elaborate marks the surface; the ground itself is the point. Visiting in late summer or early autumn, when vegetation has died back somewhat, gives the clearest view of any slight undulations or boundary features that might indicate where the burials lie.