In 679, Adomnán became the ninth abbot of Iona after Columba. Abbot Adomnán enjoyed a friendship with King Aldfrith of Northumbria. In 684, Aldfrith had been staying with Adomnán in Iona. In 686, after the death of Aldfrith's brother King Ecgfrith of Northumbria and Aldfrith's succession to the kingship, Adomnán was in the Kingdom of Northumbria on the request of King Fínsnechta Fledach of Brega in order to gain the freedom of sixty Gaels who had been captured in a Northumbrian raid two years before.