Sir Rowland Blennerhassett, 4th Baronet (1839–1909), Irish MP for Galway Borough 1865–1874 and Kerry 1880–1885
Sir | Sir Walter Scott | baronet | Baronet | Sir Arthur Conan Doyle | 4th United States Congress | Sir Robert Peel | 4th | Kelly Rowland | Rowland Hill | Sir Arthur Harris, 1st Baronet | Sir Raylton Dixon | Sir Harold Hillier Gardens | Sir Fitzroy Maclean, 1st Baronet | John Montagu, 4th Earl of Sandwich | California's 4th State Assembly district | Sir Francis Baring, 1st Baronet | Rowland Hill (postal reformer) | Thomas Howard, 4th Duke of Norfolk | Sir William Temple, 1st Baronet | Charles Lennox, 4th Duke of Richmond | Benedict Calvert, 4th Baron Baltimore | Windham Wyndham-Quin, 4th Earl of Dunraven and Mount-Earl | Sir Richard Fanshawe, 1st Baronet | George Hamilton-Gordon, 4th Earl of Aberdeen | Albert Grey, 4th Earl Grey | Sir William Johnson, 1st Baronet | Sir Robert Eden, 1st Baronet, of Maryland | Sir Orlando Bridgeman, 1st Baronet, of Great Lever | Sir Nigel |
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.