Aedh was the eldest child of King Tairrdelbach Ua Conchobair (1088–1156). His mother's identity is uncertain - Tairrdelbach had six wives - but his full brothers were Tadhg Alainn (died 1143 or 1144) and AbbotMáel Ísa of Roscommon (died 1223).
Despite his seniority, Aedh's half-brother, Conchobar Ua Conchobair was favoured by their father. In 1135, during a political low-point in Tairrdelbach's career, Aedh, in concert with his half-brother Ruaidrí, staged a rebellion.
Their attempt failed. Ruaidrí was protected by the Archbishop of Connacht, but Aedh, together with his confederate Uada Ua Con Ceanainn, was blinded by Conchobair, and Dairmait Ua Mail Ruanaid.