Donnchad mac Toirdelbaich Ó Briain

Donnchad mac Toirdelbaich Ó Briain (died 1311), eldest son of Toirdelbach Mór Ó Briain, succeeded his father as king of Thomond in 1306. He led the Clann Turlough with the backing of William de Burgh, while Richard de Clare championed his cousin Diarmait Cléirech.

On 20 May 1311 their factions fought near Bunratty, where de Burgh was captured. Donnchad fled but was run down and killed by his cousins near Corcomroe Abbey later that year.