(Dustan; Throstan) Abbot (c.600). Of the royal house of Scotland, he was educated by Saint Columba and embraced the monastic life under the Benedictine Rule. He accompanied Saint Columba to Aberdeen, was appointed by him first abbot of the monastery founded at Deir, succeeded to the abbacy of Dalquhongal (Holywood), and finally became a hermit at Glenesk, where many miracles were attributed to him. His relics were preserved at Aberdeen. Feast, 11 July.