- Drostán mac Coscreig of Deer
Born to the Scottish royalty, the son of Cosgrach. Educated by Saint Columba. Benedictine monk. Travelled to Aberdeen, Scotland with Saint Columba. First abbot of the monastery at Dier in Pictland. Abbot of Dercongal Abbey (Holywood). He evangelized the Picts, and brought Christianity to northeast Scotland. Eventually retired to live as a prayerful hermit at Glenesk. His reputation for sanctity attracted many poor and sick people, and there were many healing miracles attributed to him.
- “Saint Drostan“. CatholicSaints.Info. 9 July 2015. Web. 24 April 2017. <>