Smythe was born in Stockholm, Sweden, the son of Percy Smythe, 6th Viscount Strangford, by Ellen Burke, daughter of Sir Thomas Burke, Bt.
Baillie married firstly the Honourable Philippa Eliza Sydney Smythe, daughter of Percy Smythe, 6th Viscount Strangford, in 1840.
He was born in St Petersburg, Russia, the son of the 6th Viscount Strangford, the British Ambassador.
Horatio Nelson, 1st Viscount Nelson | Viscount | Vickers Viscount | Bernard Montgomery, 1st Viscount Montgomery of Alamein | 6th United States Congress | William Howe, 5th Viscount Howe | Simon de Montfort, 6th Earl of Leicester | viscount | South Carolina's 6th congressional district | Garnet Wolseley, 1st Viscount Wolseley | Charles Lyttelton, 10th Viscount Cobham | William Slim, 1st Viscount Slim | Michigan's 6th congressional district | Edmund Allenby, 1st Viscount Allenby | William Lamb, 2nd Viscount Melbourne | Minnesota's 6th congressional district | 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 | David Cecil, 6th Marquess of Exeter | 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 |