[1] After completing his novitiate, Bercan moved to the Diocese of Elphin where he later built the church at Cluain Coirpthe, now known as Termonbarry or Kilbarry.
The MacCoilidh family, whose name was anglicized to Cox in the early years of the seventeenth century, were hereditary custodians of St. Berach's crosier, and were considered as 'lay abbots' of Kilbarry.
[2] One account of Berach's life has him travel to Aberfoyle in Mentieth, Scotland to seek the adjudication of Áedán mac Gabráin in a land dispute.
Kilbarrack Church, County Dublin, was also named after this saint, as in his early days he spent some time there and performed many miracles, duly recorded in his life.
[4] In 1890, Dr. M. F. Cox, of Dublin, the lineal representative of the MacCoilidhs, unearthed St. Berach's boat, and had it placed beside the present Catholic church of Whitehall, near Kilbarry.