Justin McCarthy, Viscount Mountcashel (died 1694), Jacobite general in the Williamite War in Ireland
Justin Bieber | Justin Timberlake | Horatio Nelson, 1st Viscount Nelson | Viscount | Vickers Viscount | Joseph McCarthy | Cormac McCarthy | Bernard Montgomery, 1st Viscount Montgomery of Alamein | William Howe, 5th Viscount Howe | viscount | Eugene McCarthy | Justin Long | Garnet Wolseley, 1st Viscount Wolseley | Charles Lyttelton, 10th Viscount Cobham | William Slim, 1st Viscount Slim | Edmund Allenby, 1st Viscount Allenby | William Lamb, 2nd Viscount Melbourne | Paul McCarthy | McCarthy | Jenny McCarthy | Justin.tv | Justin Martyr | Julian Byng, 1st Viscount Byng of Vimy | Alan Brooke, 1st Viscount Alanbrooke | William Waldorf Astor, 1st Viscount Astor | James Bryce, 1st Viscount Bryce | Henry St John, 1st Viscount Bolingbroke | Henry John Temple, 3rd Viscount Palmerston | Edward Grey, 1st Viscount Grey of Fallodon | Charles Bathurst, 1st Viscount Bledisloe |
Some of the key members of the Institute, Stanford Shaw, Heath W. Lowry, and Justin McCarthy, argue against defining the Armenian events as genocide.
Justin Huntly McCarthy (1859–1936), Irish nationalist and UK Member of Parliament
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Justin J. McCarthy (1900–1959), American prelate of the Roman Catholic Church
He married Lady Arabella Wentworth, daughter of Thomas Wentworth, 1st Earl of Strafford, who was many years older than himself; they had no children.