St. Grimonia was an Irish maiden of illustrious birth, who left her country to consecrate herself to God. She was martyred in defense of her chastity in the place of her retirement in Picardy in the diocese of Laon. On the spot a chapel was built which became famous for her relics and miracles, and grew into a considerable town, called Capelle. In the wars in the fifteenth century her relics were translated to the abbey of regular canons of Hennin Leotard, between Douay and Lens, where she is honored together with St. Proba, her fellow martyr.