Saint Fillan, Filan, Phillan, Fáelán (Old Irish) or Faolan (modern Gaelic) is the name of probably two Scottish saints, of Irish origin. The career of a historic individual lies behind at least one of these saints, but much of the tradition surrounding Fillan seems to be of a purely legendary character.
The name Fillan probably means "little wolf" in Irish Gaelic, being formed on a diminutive of faol, an old word for the animal.
The St. Fillan whose feast is kept on 20 June had churches dedicated to his honour at Ballyheyland, County Laois, Ireland and at Loch Earn, Perthshire and Aberdour, Fifeshire.
The other, who is commemorated on 9 January, was specially venerated at Cluain Mavscua, County Westmeath, Ireland, and at the villages of Houston and Kilellan, Renfrewshire, Scotland and so early as the 8th or 9th century at Strathfillan, Perthshire, Scotland, where there was an ancient monastery dedicated to him, which, like most of the religious houses of early times, was afterwards secularized. References to the feast of St. Fillan being on 19 January occasionally appear and agreement upon which is correct has not been reached.
St. Fillan of Munster, the son of Feriach, grandson of Cellach Cualann, King of Leinster, received the monastic habit in the Abbey of Saint Fintan Munnu and came to Scotland from Ireland in 717AD as a hermit along with his Irish princess-mother St. Kentigerna, his Irish prince-uncle St. Comgan, and his siblings. They settled at Loch Duich. Fillan later moved south and is said to have been a monk at Taghmon in Wexford before eventually settling in Pittenweem (the Place of the Cave), Fife, in the east of Scotland later in the 8th century.