Domangart Réti [SEP] father
Domangart Réti
Domangart Réti was king of Dál Riata in the early 6th century, following the death of his father, Fergus Mór.
He had at least two sons: Comgall and Gabrán, both of whom became kings in succession. The "Tripartite Life of St. Patrick" states that he was present at the death of the saint, c. 493. Domangart died around 507 and was succeeded by Comgall.
His byname, Réti, appears in Adomnán's "Life of Saint Columba", in the form Corcu
Demmán mac Cairell
Demmán mac Cairill (died 572) was a king of the Dál Fiatach, and over-king of Ulaid in Ireland. He was the son of Cairell mac Muiredaig Muinderg (died 532), a previous Ulaid king and brother of Báetán mac Cairill (died 581). He ruled the Dál Fiatach and Ulaid from 557 to 572. 
Background.
According to the genealogies, he was fostered by a certain Domangart mac Predae, possibly Domangart Réti, King of Dál Riata. He acquired the