- Adelgis of Thiérarche
- Algis of Thiérarche
Monk. Spiritual student of Saint Fursey of Peronne. Missionary in the area of Arras and Laon, France. Founded a monastery in the forest around Thiérarche, Picardy; the village of Saint Algis grew up around it.
- 686 of natural causes
- Book of Saints, by the Monks of Ramsgate
- Dictionary of Saints, by John Delaney
- Our Sunday Visitor’s Encyclopedia of Saints