Fincath mac Garrchu (or Findchad mac Garrchon) (died 485) was a king of Leinster. He was a member of the Dál Messin Corb dynasty's principal sub-sept, the Uí Garrchon. He was the son of the founder of this sept Garrchú mac Fothaid.Francis J.Byrne, Irish Kings and High-Kings, Table 8
Not mentioned as king in the Book of Leinster, he is however given this title in the Annals of Innisfallen. He was defeated and killed in the first Battle of Grainaret in 485 by the Uí Néill. The victor of this battle is variously given as Coirpre mac Néill or Muirchertach mac Ercae.Annals of Ulster AU 485.1; Annals of Innisfallen AI 485.1 Coipre mac Neill was probably the victor and it may record the conquest of north Tethbae and that it was fought near Granard (County Longford)T.M.Charles-Edwards, Early Christian Ireland, pg.448
He was succeeded by his son, Fráech mac Finchada (died 495).
Notes
See also Kings of Leinster
References Annals of Ulster at CELT: Corpus of Electronic Texts at University College Cork Annals of Innisfallen at CELT: Corpus of Electronic Texts at University College Cork Charles-Edwards, T. M. (2000), Early Christian Ireland, Cambridge: Cambridge University Press, Byrne, Francis John (2001), Irish Kings and High-Kings, Dublin: Four Courts Press, Ireland, 400-800, pp. 188, by Dáibhí Ó Cróinín A New History of Ireland, Vol. I, (edited Ó Cróinín).
External links CELT: Corpus of Electronic Texts at University College Cork includes: Gein Branduib (original & translation), Annals of Ulster, Annals of Tigernach, Annals of Innisfallen and others.