[1] According to the Book of Leinster, Brandub succeeded Áed Cerr mac Colmáin Már (died 595) of the Uí Dúnlainge as king of Leinster (actually Áed Dibchine mac Senaig of the Uí Máil)[2] In the Rawlinson B 502 manuscript, dated to c. 1130, is the poem Gein Branduib maic Echach ocus Aedáin maic Gabráin (The Birth of Brandub son of Eochu and of Aedán son of Gabrán).
[5] The Borúma Laigin (Cattle Tribute of Leinster) and the annals record that the war was caused by Brandub's killing of Áed's son Cummascach in 597 at Dún Buchat.
Aedan then devised a strategy of having the forces of Brandub hide in food baskets to sneak into the enemy camp.
[7] According to later poems in the Book of Leinster, which record his "seven blows against Brega" (later ruled by the Síl nÁedo Sláine), he may also have reconquered lands lost to the Uí Néill in the midlands of Ireland.
[10] In 605 Brandub suffered a defeat at the Battle of Slaebre by the Ui Neill under the high king Áed Uaridnach of the Cenél nEógain.