Fergno Britt mac Faílbi

Fergnae or Fergno Britt mac Faílbi was the fourth abbot of Iona (605–623). Fergnae was the first abbot of Iona to have come from outside Saint Columba's generation. Moreover, unlike his predecessors, he was not from the Cenél Conaill, the kin-group to which Columba belonged. Adomnán records that he witnessed one of Columba's miracles. Fergnae died in 623, and was succeeded by Ségéne.