Ólchobar mac Flainn (died 796) was a supposed King of Munster from the Uí Fidgenti of County Limerick, allies and/or distant cousins of the Eóganachta.
[2] The consideration that a non-Eóganachta could have held the throne is a symptom of the decline of the inner circle of the Eóganachta in the later 8th century after the death of Cathal mac Finguine (died 742).
The Annals of Innisfallen do not call him King of Munster at his death obit but do refer to his holding the lay-abbacy of Inis Cathaig or Scattery Island.
The Uí Fidgenti had their own large capital at Dún Eochair, established several centuries before the rise of the Eóganachta by the Dáirine, once the great power of Munster.
If the most ancient genealogies are correct, e.g. Rawlinson B 502, they descended from an uncle of Conall Corc known as Dáire Cerbba.