Tobarnasgornaighe, sitting in the townland of Garraunard in County Mayo, contains the Irish word tobar, meaning a well, most likely a holy well of the kind that appears in enormous numbers across the Irish landscape. These sites, typically associated with a saint, a pattern day, or a tradition of curative water, were woven so deeply into local religious life that many survived the upheavals of the Reformation and the Penal era more or less intact, kept alive by the communities who depended on them.

The second element of the name, nasgornaighe, is less immediately transparent, and without further documentation it is difficult to say with certainty what saint or figure the well commemorates, or what particular customs once attended it. Mayo is exceptionally rich in such sites, a county where early medieval Christianity layered itself over older sacred landscapes, and where wells, stones, and enclosures were pressed into devotional use for centuries. Garraunard itself, as a place name, likely derives from the Irish garán, a shrubbery or thicket, suggesting a setting that would have felt appropriately secluded for a site of prayer or pilgrimage.

Beyond its name and its classification as a recorded monument, the specific details of Tobarnasgornaighe remain thinly documented in publicly available sources. That obscurity is itself a common condition for this category of site. Many holy wells in rural Ireland survive as modest, unmarked features, a stone-lined hollow or a damp hollow in a field, recognisable mainly to those who already know to look.