Maelsuthan Ua Cerbhail

Maelsuthan Ua Cerbhail, Maelsuthain O'Carroll, or Maelsuthain O'Cearbhail (died 1010) was a political and academic figure in medieval Ireland. He was lord of the Eóganacht Locha Léin, advisor to High King Brian Boru, and an important scholar often credited for beginning the Annals of Innisfallen. Maelsuthan's academic reputation was considerable, earning him accolades like "chief doctor of the Western world in his time" and "sage of Ireland."