Thomas Jefferson | Sir | Thomas Edison | Sir Walter Scott | Thomas | Thomas Hardy | Thomas Mann | Thomas Aquinas | 3rd Rock from the Sun | baronet | Clarence Thomas | Thomas Gainsborough | Baronet | Dylan Thomas | Thomas Pynchon | St. Thomas | Saint Thomas, U.S. Virgin Islands | Thomas Carlyle | Thomas the Tank Engine | Thomas Moore | Thomas Cromwell | Thomas Becket | Thomas the Apostle | Thomas Merton | Thomas Tallis | Thomas Paine | Sir Arthur Conan Doyle | Roy Thomas | Thomas Telford | Thomas More |
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.
His younger brother was the visual neuroscientist Horace Barlow.
The eminent physician Sir Thomas Barlow, who attended Queen Victoria on her deathbed, owned Boswells (a large country house to the South of Wendover) until his death in 1945 and the actor John Junkin lived in Wendover until his death in 2006.