Mechell was a 6th-century abbot who established the Llanfechell monastery on Anglesey in north-west Wales. Although born in Wales, some traditions suggest he may have been of Breton origin. He is historically recognized as the founder of a local *clas*, an early type of Celtic monastic community. Over time, his identity became linked with Saint Machudd, a bishop of Caerwent, due to shared feast days and similar hagiographical details.