Major John Ronald Hamilton Cartland was a British Conservative Party politician. He was the Member of Parliament (MP) for King's Norton in Birmingham from 1935 until he was killed in action, aged 33. He was the brother of Barbara Cartland.

Dame Mary Barbara Hamilton Cartland, was an English writer, known as the Queen of Romance, who published both contemporary and historical romance novels, the latter set primarily during the Victorian or Edwardian period. Cartland is one of the best-selling authors worldwide of the 20th century.