Amandus (c. 584 – 679), commonly called Saint Amand, was a bishop of Tongeren-Maastricht and one of the catholic missionaries of Flanders. He is venerated as a saint, particularly in France and Belgium. Life. The chief source of details of his life is the Vita Sancti Amandi, an eighth-century text attributed to Beaudemond (Latin: Baudemundus). The vita was expanded by Philippe, abbot of Aumône. According to this biography, Amand was born in Lower Poitou. He was of noble birth but at the age of twenty, he became a monk on the Île d'Yeu, against the wishes of his family.
https://en.wikipedia.org/wiki/Amandus