Murrough McDermot O'Brien, 3rd Baron Inchiquin

Murrough McDermot O'Brien (c.1550 - April 20, 1573) was the 3rd Baron Inchiquin. He was the son of Dermod O'Brien, 2nd Baron Inchiquin and Margaret O'Brien and inherited his title in 1557 on the death of his father. He married Mabel Nugent, daughter of Christopher Nugent, 6th Baron Delvin; Murrough O'Brien, 4th Baron Inchiquin was their son and heir. He was murdered in 1573 by Dermot O'Shaughnessey, supposedly at the instigation of Ulick Burke, 3rd Earl of Clanricarde.