Bernard of Thiron was an 11th-century Benedictine monk and abbot who lived in France. Born near Abbeville in 1046, he entered the Saint-Cyprien monastery at the age of 19. After serving as a prior at Saint-Savin, he spent time living as a hermit in various locations, including a cave on Chausey island. He was known for his commitment to manual labor, often supporting himself through woodworking. He eventually founded the Abbey of the Holy Trinity and established the Tironensian Order.