Aedh mac Cathal Crobdearg Ua Conchobair (reigned 1224–1228) was King of Connacht with opposition alongside his uncle Toirdhealbhach mac Ruaidhrí Ó Conchobhair. Aedh succeeded his father Cathal Crobhdearg upon his death in 1224 but struggled to assert control over the entire province. His reign closely mirrored the early years of his father's reign, with two rival claimants, backed by outside powers, fighting an indecisive civil war lasting several years.
Biography
When his father Cathal died in 1224, Aedh initially succeeded him smoothly because, as the Annals of Connacht note, "he had been king in effect by the side of his father and already held all the hostages of Connacht. And God granted him this kingdom, for no crime was committed in Connacht at the moment of his accession save one robbery on the road to Cruach, and the hands and feet of the robber were cut off, and the violation of one woman by O Mannachan's son, who was blinded forthwith for the offence." His accession is celebrated in the poem Congaibh rom t'aghaidh, a Aodh, in which he is said to be the prophesied Aodh who will drive the English 'usurpers' from Ireland.
His first major act as king was to join an expedition against the de Lacy family by the majority of Irish and Norman lords from the south of Ireland on behalf of the King of England. This brought these lords into conflict with the de Lacys' ally Aodh O'Neill, King of Ailech, and ended in a stalemate due to reluctance to attack O'Neill's superior defensive position.
Aedh thereafter received the submission of his rebellious vassals and guarantees to no longer support his rivals, the sons of Ruadhri. However, they were merely biding their time until Aedh's Norman allies dispersed, and promptly rebelled again in 1225 when their armies left the kingdom. Aedh's only response was to recall his allies once more who again answered his call eagerly as they were permitted to plunder the province as payment. Toirdhealbhach and his followers were again forced to seek refuge in Ulster with the O'Neill's and in 1226, many hostages, including Aedh's own son and daughter, were given to the Normans as guarantee of future payment for their support.