He assumed by Royal license the additional surname of Olmius in 1787 after the death of his brother-in-law, Drigue Olmius, 2nd Baron Waltham.
Baron | William Cecil, 1st Baron Burghley | baron | Charles Lennox, 2nd Duke of Richmond | Waltham, Massachusetts | Sacha Baron Cohen | Joseph Lister, 1st Baron Lister | Joey Baron | Robert Baden-Powell, 1st Baron Baden-Powell | Henry Brougham, 1st Baron Brougham and Vaux | Robert Devereux, 2nd Earl of Essex | Hugh Grosvenor, 2nd Duke of Westminster | Guy Carleton, 1st Baron Dorchester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | 2nd United States Congress | Waltham | Michigan's 2nd congressional district | 2nd | William Petty, 2nd Earl of Shelburne | William Lamb, 2nd Viscount Melbourne | Hugh Percy, 2nd Duke of Northumberland | William Wallace, Baron Wallace of Saltaire | William Tyssen-Amherst, 1st Baron Amherst of Hackney | James Mackay, Baron Mackay of Clashfern | Hercules Robinson, 1st Baron Rosmead | George Villiers, 2nd Duke of Buckingham | George Brydges Rodney, 1st Baron Rodney | Beechcraft Baron | Thomas Seymour, 1st Baron Seymour of Sudeley | Thomas Denman, 1st Baron Denman |