Born in The Corran, County Antrim, Ireland, the son of Malcolm McNeill, his mother was the sister of Duncan McNeill, 1st Baron Colonsay.
Baron | Louis Mountbatten, 1st Earl Mountbatten of Burma | Horatio Nelson, 1st Viscount Nelson | Herbert Kitchener, 1st Earl Kitchener | Charles Cornwallis, 1st Marquess Cornwallis | 1st United States Congress | Frederick Roberts, 1st Earl Roberts | Bernard Montgomery, 1st Viscount Montgomery of Alamein | William Cecil, 1st Baron Burghley | Robert Harley, 1st Earl of Oxford and Earl Mortimer | George Villiers, 1st Duke of Buckingham | Thomas Wentworth, 1st Earl of Strafford | James Abbott McNeill Whistler | baron | William Pitt, 1st Earl of Chatham | Sacha Baron Cohen | Joseph Lister, 1st Baron Lister | Joey Baron | Robert Baden-Powell, 1st Baron Baden-Powell | John Scott, 1st Earl of Eldon | Henry Brougham, 1st Baron Brougham and Vaux | Edward Seymour, 1st Duke of Somerset | Robert, 1st Earl of Gloucester | Guy Carleton, 1st Baron Dorchester | Garnet Wolseley, 1st Viscount Wolseley | Douglas Haig, 1st Earl Haig | Isadora Duncan | George Monck, 1st Duke of Albemarle | Frederick Schomberg, 1st Duke of Schomberg | Edward Hyde, 1st Earl of Clarendon |
Lord Colonsay died at Pau, France, on 31 January 1874, aged 80, when the title became extinct.