Viscount Avonmore was a title in the Peerage of Ireland created on 29 December 1800 for the former Attorney-General for Ireland and Lord Chief Baron of the Exchequer for Ireland, Barry Yelverton, 1st Baron Yelverton.
Horatio Nelson, 1st Viscount Nelson | Viscount | Vickers Viscount | Bernard Montgomery, 1st Viscount Montgomery of Alamein | William Howe, 5th Viscount Howe | viscount | 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 | 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 | Walter Runciman, 1st Viscount Runciman of Doxford | Viscount Falkland | Samuel Hood, 1st Viscount Hood | John Anderson, 1st Viscount Waverley | James Craig, 1st Viscount Craigavon | William Beresford, 1st Viscount Beresford | William Barrington, 2nd Viscount Barrington | Stapleton Cotton, 1st Viscount Combermere | Rowland Hill, 1st Viscount Hill | Marcus Samuel, 1st Viscount Bearsted | John Monckton, 1st Viscount Galway |
Theresa Longworth, an English Catholic, and Major The Hon. William Charles Yelverton (who later became, in 1870, The 4th Viscount Avonmore), an Irish Protestant, met in 1852.