St Finnian of Clonard's feast-day is 12 December,[2] which is first attested in a Spanish Martyrology of the 9th century

Fionn mac Cumhaill (/ˈfɪn məˈkuːl/ fi-UN mə-KOOL; Irish pronunciation: [ˈfʲin̪ˠ mˠakˠ ˈkuw̃əlːʲ]; Northern Irish: [ˈfʲin̪ˠ mˠakˠ ˈkuw̃əlːʲ]; Western Irish: [ˈfʲiːn̪ˠ mˠakˠ ˈkuw̃əlʲ]; Southern Irish: [ˈfʲuːn̪ˠ mˠakˠ ˈkuːlʲ]; Old Irish language and Middle Irish Find or Finn [1][2] mac Cumail or Umaill, sometimes transcribed in English as MacCool or MacCoul) was a mythical hunter-warrior of Irish mythology, occurring also in the mythologies of Scotland and the Isle of Man. The stories of Fionn and his followers the Fianna, form the Fenian Cycle (an Fhiannaíocht), much of it narrated in the voice of Fionn's son, the poet Oisín.Fionn mac Cumhaill (/ˈfɪn məˈkuːl/ fi-UN mə-KOOL; Irish pronunciation: [ˈfʲin̪ˠ mˠakˠ ˈkuw̃əlːʲ]; Northern Irish: [ˈfʲin̪ˠ mˠakˠ ˈkuw̃əlːʲ]; Western Irish: [ˈfʲiːn̪ˠ mˠakˠ ˈkuw̃əlʲ]; Southern Irish: [ˈfʲuːn̪ˠ mˠakˠ ˈkuːlʲ]; Old Irish language and Middle Irish Find or Finn [1][2] mac Cumail or Umaill, sometimes transcribed in English as MacCool or MacCoul) was a mythical hunter-warrior of Irish mythology, occurring also in the mythologies of Scotland and the Isle of Man. The stories of Fionn and his followers the Fianna, form the Fenian Cycle (an Fhiannaíocht), much of it narrated in the voice of Fionn's son, the poet Oisín.Finn was originally a Celtic god. His name originates from the Celtic Vindos, giving the Welsh Gwyn (viz. the mythological figure Gwyn ap Nudd), and the Gaulish Vindonnus, and means "blond", "fair", "white", or "bright". That a widespread cult of Finn existed among European celts is reflected in continental place names derived from Finn or Vindos, such as Vienna,Muirne gave birth to a son, whom she called Deimne (/ˈdeɪni/; Irish pronunciation: [dʲeβ̃nʲi]),[4] literally "sureness" or "certainty", also a name that means a young male deerpoet Finn Eces, or Finnegas, near the river Boyne and studied under him. Finnegas had spent seven years trying to catch the Salmon of Knowledge, which lived in a pool on the Boyne and became all-knowing through its diets of hazelnuts from a holy tree: whoever ate the salmon would gain all the knowledge in the world.According to the most popular account of Fionn's death, he is not dead at all, rather, he sleeps in a cave, surrounded by the Fianna. One day he will awake and defend Ireland in the hour of her greatest needhttps://en.wikipedia.org/wiki/Fenian_Cycle..