Cuilén and another son of Illulb were slain in 971, after which the kingship was taken up by Dub's brother, Cináed mac Maíl Choluim.
Cuilén e outro fillo de Illulb foron asasinados en 971, despois do cal o trono foi tomado polo irmán de Dub, Cináed mac Maíl Choluim.