Sir Tristram Beresford, 3rd Baronet (1669–1701), his grandson, Irish MP for Londonderry County 1692–1699
Sir | Sir Walter Scott | 3rd Rock from the Sun | baronet | Baronet | Sir Arthur Conan Doyle | South Carolina's 3rd congressional district | Bruce Beresford | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Sir Robert Peel | Michigan's 3rd congressional district | Thomas Fairfax, 3rd Lord Fairfax of Cameron | 3rd United States Congress | Fernando Álvarez de Toledo, 3rd Duke of Alba | 3rd arrondissement of Marseille | Sir Arthur Harris, 1st Baronet | Sir Raylton Dixon | Sir Harold Hillier Gardens | Sir Fitzroy Maclean, 1st Baronet | Sir Francis Baring, 1st Baronet | Tristram Risdon | Sir William Temple, 1st Baronet | Henry John Temple, 3rd Viscount Palmerston | Thomas Radclyffe, 3rd Earl of Sussex | Sir Richard Fanshawe, 1st Baronet | Richard of York, 3rd Duke of York | John Stuart, 3rd Earl of Bute | Alabama's 3rd congressional district | 3rd Battalion | William Cavendish-Bentinck, 3rd Duke of Portland |
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.
Sir Tristram Beresford, 1st Baronet (died 1673), Irish MP for Londonderry County 1634, 1656–1658, 1661–1666