It belonged to Rt Hon Standish O’Grady (1st Viscount Guillamore in 1831) Lord Chief Baron of the Exchequer in Ireland. Standish O'Grady born in 1766 married Katherine Waller, daughter of John T. Waller in 1790. He died on 21 April 1840. He was created 1st Baron O'Grady, of Rockbarton, co. Limerick on 28 January 1831 and was created 1st Viscount Guillamore, of Cahir Guillamore, Co. Limerick on the same day.
The O’Grady coat of arms per pale gules (red) and sable (black) three lions passant guardant per pale argent (silver) and or (gold), the centre lion charged with a portcullis azure (blue). Supporters: Two lions guardant per fesse argent and or, each charged on the shoulder with a portcullis azure. Motto: ‘Vulneratus non virtus’ (‘wounded but not conquered’).