Don Watson is an Australian author, screenwriter, former political adviser, and speechwriter.

Donald Allen Wollheim was an American science fiction editor, publisher, writer, and fan. As an author, he published under his own name as well as under pseudonyms, including David Grinnell, Martin Pearson, and Darrell G. Raynor. A founding member of the Futurians, he was a leading influence on science fiction development and fandom in the 20th-century United States. Ursula K. Le Guin called Wollheim "the tough, reliable editor of Ace Books, in the Late Pulpalignean Era, 1966 and '67", which is when he published her first two novels in Ace Double editions.

Donald Edwin Westlake was an American writer with more than one hundred novels and non-fiction books to his credit. He specialized in crime fiction, especially comic capers, with an occasional foray into science fiction and other genres. Westlake created two professional criminal characters who each starred in a long-running series: the relentless, hardboiled Parker, and John Dortmunder, who featured in a more humorous series.

Donald Grant Mitchell was an American essayist and novelist who usually wrote under the pen name Ik Marvel.

Donald William Alers Hankey was an English soldier best known for two volumes of essays about the British volunteer army in World War I both titled A Student in Arms.

Donald Ogden Stewart was an American writer and screenwriter best known for his sophisticated golden age comedies and melodramas such as The Philadelphia Story, Tarnished Lady and Love Affair. Stewart worked with a number of the directors of his time, including George Cukor, Michael Curtiz and Ernst Lubitsch. Stewart was a member of the Algonquin Round Table and, with Ernest Hemingway's friend Bill Smith, the model for Bill Gorton in The Sun Also Rises. His 1922 parody on etiquette, Perfect Behavior, published by George H. Doran and Co., was a favourite book of P. G. Wodehouse.

Donald John Trump is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021.

Dora, Countess Russell was a British author, a feminist and socialist campaigner, and the second wife of the philosopher Bertrand Russell. She was a campaigner for contraception and peace. She worked for the UK-government-funded Moscow newspaper British Ally, and in 1958 she led the "Women's Peace Caravan" across Europe during the Cold War.

Dora Maria Sigerson Shorter was an Irish poet and sculptor, who after her marriage in 1895 wrote under the name Dora Sigerson Shorter.

Cecil William Mercer, known by his pen name Dornford Yates, was an English writer and novelist whose novels and short stories, some humorous, some thrillers, were best-sellers during the Interwar Period.