The place-name itself offers the first clue: the Irish "Lios" points to a ringfort or enclosed settlement, the kind of roughly circular earthwork that was once one of the most common forms of rural habitation in early medieval Ireland. Tens of thousands of these enclosures survive across the country in varying states of preservation, defined by their banks and ditches, their raised interiors, and the sense that the ground has been deliberately shaped by human hands. That Lissavruggy carries this name suggests the site has been recognised locally for a very long time, even if the formal record remains sparse.