Ursicinus of Saint-Ursanne was a 7th-century Irish missionary and hermit who lived in the Jura region. A follower of Columbanus, he reportedly accompanied his master following the latter's banishment from Burgundy around 610. Seeking a more solitary life, he eventually settled as a hermit within the Doubs valley. His life and religious activities are documented in an 11th-century biography, which details his transition from a disciple to a solitary ascetic.