Caoin, anglicised as "Glankeen Abbey." Kilcuilan (St. Cualan's Church) was dedicated to him at a nearby holy well. A bell attributed to this saint, known as the "Bearnan Culan" or "Glankeen Bell" is now housed at the British Museum in London. A replica may be seen in the sanctuary of the parish church in Borrisoleigh.

After the Norman invasion of Ireland in the 12th century, the O'Dwyer and DeBurgo clans established a fortress on the River