Fillan, St., a name borne by two Scottish saints: (1) the son of a Munster prince, lived in the 8th century, was first abbot of the monastery on the Holy Loch in Argyll, and afterwards laboured at Strathfillan, Perthshire; some of his relics are to be seen in the Edinburgh Antiquarian Museum; (2) or Faolan, known as “the leper,” had his church at the end of Loch Earn, Perthshire; a healing well and chair are associated with his name.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Filioque Controversy * Fillmore