The castle’s peculiar name likely derives from the earthen construction materials or clay soils of its Limerick location, though by the time it appears in historical records, it was presumably a more substantial structure than its nickname suggests.

The castle first emerges in documented history in 1540, when it was recorded as ‘Caislean criaidh in Duntriliag’ in the Burke Rental. Over a century later, the property became entangled in the complex land transfers following the Cromwellian conquest. In 1655, J. Cantwell sold Castle Creagh to Hugh Massy, beginning a confusing series of ownership changes; the sale was confirmed to Massy in 1667, then somehow passed to W. Barraby, before returning to J. Cantwell the following year. This rapid succession of owners reflects the broader upheaval of Irish land ownership during this period, when properties changed hands through confiscation, sale, and political manoeuvring.

By the 18th century, the castle had become a residence of the Bennett family, who presumably occupied it for several generations. However, like many Irish tower houses and minor castles, Castle Creagh couldn’t withstand the passage of time and changing architectural fashions. When documented in 1827, the once proud stronghold had already fallen into ruin, joining the ranks of countless other Irish castles that dot the countryside as romantic reminders of a more turbulent past.