Eustace of Luxeuil was a 6th and 7th-century monk and abbot who served as the second leader of the monastery at Luxeuil. Born in Burgundy, he became a devoted disciple of the founder Columbanus. After his teacher was exiled from the Kingdom of Burgundy, Eustace took over the leadership of the community. Under his guidance, the monastery grew into a significant center of education and holiness, housing approximately 600 monks during his tenure.