Fíngen mac Áedo Duib (Modern Irish: Finghin mac Aodha Dhuibh, pronounced [ˈfʲɪɲʝənʲ mˠək ˈiːə ɣəvʲ]) (died 618)[1] was a King of Munster from the Eóganacht Chaisil branch of the Eoganachta.
There is some dispute in the sources as to his reign and that of Áed Bennán mac Crimthainn (died 618) of the Loch Lein branch.
His reign was a prosperous one:[5]Munster in the time of Fíngen mac Áedo, its store-houses were full, its homesteads were fruitful.According to the saga Mór of Munster and the Violent Death of Cuanu mac Ailchine he was originally married to a Deisi woman but later married Mór Muman (died 636), the daughter of Áed Bennán.
His sons by Mór were Sechnussach and Máenach mac Fíngin (died 661) who was a King of Munster.
The direct descendants of Fíngen mac Áedo Duib were known as the Cenél Fíngin, are the O'Sullivans and MacGillycuddys.