Pairs of standing stones are relatively uncommon in the Irish archaeological record compared with solitary examples, and their purpose remains genuinely debated. They may have marked boundaries, served as sighting lines for astronomical events, or functioned as ceremonial waypoints along routes that no longer exist in any recognisable form. Whatever their original intent, the simple fact of there being two rather than one tends to sharpen the question of why they were placed where they were, and by whom.

Standing stones in Ireland date broadly from the Neolithic through to the early medieval period, though most paired examples are thought to belong to the Bronze Age, somewhere in the broad span between 2500 and 500 BC. The townland name Knockalegan derives from the Irish, with "cnoc" meaning hill, suggesting the stones occupy or overlook elevated ground, which is typical of the tradition. Mayo has a substantial concentration of prehistoric megalithic monuments, shaped in part by the county's geology and by the long history of human settlement on its uplands and boglands. Beyond the classification and location, the specific history of this particular pair, their dimensions, condition, and relationship to surrounding features, remains to be fully documented in the public record.