Murrough O'Brien, 3rd Baron of Inchiquin

1573; Murrough, the son of Dermot, son of Murrough O'Brien, was slain by Ulick Burke, the son of Rickard, who was son of Ulick-na-gCeann, and O'Shaughnessy, i.e. Dermot Reagh, the son of Dermot, who was son of William, son of John Boy. O'Shaughnessy was the man who laid hands on him. John Burke deprived O'Shaughnessy of Gort-insi-Guaire, in revenge of the killing of his kinsman. Source; Annals of the four masters.

• Burke, Bernard, Sir. A genealogical and heraldic dictionary of the peerage and baronetage of the British Empire. London : Harrison 1869. page 615