Saint Mechell was the 6th century founder and first abbot of the clas (a type of early Welsh/Celtic monastery) of Llanfechell, on Anglesey in north-west Wales.
He was said to have been a Breton by birth. From the 14th century, he was identified with Saint Machudd, a Welshman and supposed Bishop of Caerwent who has been hopelessly confused with Saint Malo.
His feast day is November 15, the same as Saint Malo.