Énna Mac Murchada

Énna Mac Murchada, or Enna Mac Murchada, also known as Énna mac Donnchada, and Énna mac Donnchada mic Murchada, was a twelfth-century ruler of Uí Chennselaig, Leinster, and Dublin. Énna was a member of the Meic Murchada, a branch of the Uí Chennselaig dynasty that came to power in Leinster in the person of his paternal great-grandfather. Énna himself gained power following the death of his cousin Diarmait mac Énna. Throughout much of his reign, Énna acknowledged the overlordship of Toirdelbach Ua Conchobair, King of Connacht, although he participated in a failed revolt against the latter in 1124 before making amends. When Énna died in 1126, Toirdelbach successfully took advantage of the resulting power vacuum.