Aventin was an 8th-century Frankish hermit who lived in the Pyrenees region. Born near Bagnères-de-Luchon, he eventually settled in the Larboust valley to live a solitary life. He is remembered through various legends involving miraculous feats, such as surviving a fall from a tower or walking while carrying his own severed head. His death is associated with a subsequent plague in the area, leading local people to seek his spiritual protection.