They appear on an eighteenth-century estate map of Barbavilla Demesne, annotated simply as "Old Ponds", which suggests that even by that point their origins were not entirely clear to whoever commissioned or drew the map.

Fish-ponds of this kind were a common feature of medieval and early modern estates across Ireland and Britain. Typically engineered by damming or diverting a water source, they were used to keep live fish, most often carp or other freshwater species, as a reliable food supply. Their rectangular form is a telling detail; natural ponds tend toward irregular shapes, while a managed fish-pond was a deliberate piece of infrastructure, reflecting both practical need and a degree of status on the part of the landowner. The Barbavilla estate in Westmeath was a substantial demesne, and these four ponds on the Yellow River would have sat within a wider landscape of organised agricultural and domestic provision. Their precise antiquity, however, remains unknown. The eighteenth-century map records them as already old, but whether they date to the post-medieval period of the estate or to something considerably earlier has not been established.