Saint Illtud was a prominent figure in early Christian history, known as a Welsh abbot and a founder of monastic communities. He is often associated with the establishment of the Llantwit Major monastery in Wales, which became a significant center for learning and spirituality during the 6th century. His life is celebrated for promoting Christianity in the region and training many future saints. Illtud is also recognized for his connections to other notable figures, including Saint David, the patron saint of Wales. His legacy is commemorated on his feast day, which is observed on November 6th, reflecting his enduring influence in the Christian tradition of the area.