Edward Bruce, d. 1318, Scottish king of Ireland, brother of Robert I of Scotland. He aided his brother in the war for independence from England and in 1315 was declared heir to Robert's throne. With Robert's approval he then invaded Ulster, to which he had some hereditary claim. He was crowned king of Ireland in 1316 and found many Irish allies against the Anglo-Irish rulers. However, he failed to consolidate his gains and was killed in battle in 1318.