Wikipedia
Forannan
Forannan, fl. c. 969, was Bishop of Donoughmore.
His clan held the plain of Magh Feimhin, near Clonmel. Forannan was chosen bishop by popular election, and consecrated, according to his 'Life,' in 'the city called in the barbarous dialect of the Irish Domhnach mor,' i.e. Donoughmore, which, it is added, is the metropolis of Ireland. From this Lanigan erroneously inferred it to have been in Armagh. But the 'Book of Leinster,' the 'Lebar Brecc,' and the 'Martyrology of Donegal' all term him of 'Donoughmore in Magh Feimhin,' the territory of his family.