Áedán mac Gabráin
The Irish annals have two reports of Máel Umai. The first, in the "Annals of Tigernach" states that he fought alongside Áedán mac Gabráin of Dál Riata at the Battle of Degsastan where Áedán was defeated by the Northumbrian ruler Æthelfrith. According to the annals, Máel Umai killed Æthelfrith's brother, who is incorrectly called Eanfrith. Bede confirms the death of Æthelfrith's brother at Degsastan, giving his name as Theodbald, and adding that he was killed along with all of his retinue. Bede dates the battle to 603 and the "Annals of Tigernach" to 598. The second report of Máel Umai is the notice of his death, probably in 608.