Ninnoc was a 5th-century abbess born in Wales who later established a religious community in Brittany. According to her hagiography, she chose a life of devotion over marriage after being inspired by the preaching of Germanus. Upon arriving in Brittany, she received land from King Gueric to found a double monastery for both men and women. This settlement, which eventually became known as Lannennoc, served as a center for spiritual life and practical instruction for the local population.