Celtic saint of the sixth century, whose original enclosure of cell, wooden church, and holy well can still be seen. This, like those of some other Welsh hermits, is situated near the top of a hill. The present town and church of Llanfyllin developed later in the nearby valley. Attempts to identify Myllin with the more famous Irish saint Mullins or Moling are unconvincing. Myllin was a local saint almost unknown beyond his immediate neighbourhood.