Fiac an Irish saint, commemorated October 12, was bishop of Sleibhte (now Sletty), and is said to have been consecrated by St. Patrick. There are two hymns attributed to him; one (probably genuine) entitled The Praise of St. Patrick: — another (probably spuriotis), The Hymn on St. Brigida. See Smith, Dict. of Christ. Biog. s.v.