Sir | Sir Walter Scott | 3rd Rock from the Sun | baronet | Baronet | Edmund Burke | Edmund Spenser | Sir Arthur Conan Doyle | Edmund Hillary | Edmund Wilson | South Carolina's 3rd congressional district | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Sir Robert Peel | Michigan's 3rd congressional district | Thomas Fairfax, 3rd Lord Fairfax of Cameron | Edmund Husserl | 3rd United States Congress | Fernando Álvarez de Toledo, 3rd Duke of Alba | 3rd arrondissement of Marseille | Sir Arthur Harris, 1st Baronet | Edmund Muskie | Edmund Allenby, 1st Viscount Allenby | Sir Raylton Dixon | Sir Harold Hillier Gardens | Sir Fitzroy Maclean, 1st Baronet | Edmund Barton | Sir Francis Baring, 1st Baronet | Edmund the Martyr | Edmund Rubbra | Edmund Kirby Smith |
His father, William Harcourt Isham Mackworth (1806—1872), a younger son of Sir Digby Mackworth, the 3rd Baronet, took the additional surname Dolben after he married Frances, the heiress of Sir John English Dolben, the 4th Baronet.
Lechmere was the son of Sir Edmund Hungerford Lechmere, 2nd Baronet of Hanley Castle, Worcestershire and his wife Maria Clara Murray, daughter of Hon.