Ralph Waldo Emerson, who went by his middle name Waldo, was an American essayist, lecturer, philosopher, abolitionist, and poet who led the transcendentalist movement of the mid-19th century. He was seen as a champion of individualism and a prescient critic of the countervailing pressures of society. Friedrich Nietzsche considered him "the most gifted of the Americans" and Walt Whitman referred to him as his "master".

Ralph Waldo Trine was an American New Thought writer, philosopher and animal welfare activist.

Ramon Llull was a philosopher, theologian, poet, missionary, Christian apologist and former knight from the Kingdom of Majorca.

Gordon Randall Phillip David Garrett was an American science fiction and fantasy author. He was a contributor to Astounding and other science fiction magazines of the 1950s and 1960s. He instructed Robert Silverberg in the techniques of selling large quantities of action-adventure science fiction, and collaborated with him on two novels about men from Earth disrupting a peaceful agrarian civilization on an alien planet.

George Randall Parrish (1858–1923) was an American lawyer, journalist, and writer, in particular, author of dime novels, including Wolves of the Sea .

Raoul Whitfield was an American writer of adventure, aviation, and hardboiled crime fiction. During his writing career, from the mid-1920s to the mid-1930s, Whitfield published over 300 short stories and serials in pulp magazines, as well as nine books, including Green Ice (1930) and Death in a Bowl (1931). For his novels and contributions to the Black Mask, Whitfield is considered one of the original members of the hard-boiled school of American detective fiction and has been referred as "the Black Mask's forgotten man".

Raphael Holinshed was an English chronicler, who was most famous for his work on The Chronicles of England, Scotlande, and Irelande, commonly known as Holinshed's Chronicles. It was the "first complete printed history of England composed as a continuous narrative". The Holinshed Chronicles was a major influence on many Renaissances writers, such as Shakespeare, Spenser, Daniel and Marlowe.

Ray Douglas Bradbury was an American author and screenwriter. One of the most celebrated 20th-century American writers, he worked in a variety of modes, including fantasy, science fiction, horror, mystery, and realistic fiction.

Ray Cummings was an American author of science fiction literature and comic books.

Ray Stannard Baker was an American journalist, historian, biographer, and writer.