Eóganacht Raithlind or Uí Echach Muman are a branch of the Eóganachta, the ruling dynasty of Munster in southwest Ireland during the 5th-10th centuries.
An important sub-sept of the Cenel nÁeda were the Cénel mBéicce, descended from Bécc mac Fergusa (died 661) who gave their name to the barony of Kinelmeaky.
The Cenél Láegaire were descended from Echu's grandson Lóegaire mac Crimthainn and expanded westward toward Bantry as early as the 8th century.
According to tradition Mac Cass died before his father and so Conall Corc took his son's inheritance and instead imposed his grandson Echu in the south thereby excluding them from the inner circle of Eoganachta.
In any event, following that era the O'Donoghues eventually gained the advantage in the region with Cashel also having a hand in the interim dynamics.