Robert William Service was a British-Canadian poet and writer, often called "the Bard of the Yukon". Born in Lancashire of Scottish descent, he was a bank clerk by trade, but spent long periods travelling in the west in the United States and Canada, often in poverty. When his bank sent him to the Yukon, he was inspired by tales of the Klondike Gold Rush, and wrote two poems, "The Shooting of Dan McGrew" and "The Cremation of Sam McGee", which showed remarkable authenticity from an author with no experience of the gold rush or mining, and enjoyed immediate popularity. Encouraged by this, he quickly wrote more poems on the same theme, which were published as Songs of a Sourdough, and achieved a massive sale. When his next collection, Ballads of a Cheechako, proved equally successful, Service could afford to travel widely and live a leisurely life, basing himself in Paris and the French Riviera.

Robert Wallace was a minister of the Church of Scotland and writer on population.

Robert Waln was a United States representative from Pennsylvania. Born in Philadelphia in the Province of Pennsylvania, he received a limited schooling, engaged in mercantile pursuits and in East India and China trade, was a member of the Pennsylvania Legislature for several years, and was a member of the city council of Philadelphia, serving as president of the select council.

Robert Walser was a German-speaking Swiss writer. Walser is understood to be the missing link between Heinrich von Kleist and Franz Kafka. As writes Susan Sontag, "at the time [of Walser's writing], it was more likely to be Kafka [who was understood] through the prism of Walser." For example, Robert Musil once referred to Kafka's work as "a peculiar case of the Walser type."

Robert William Mackay (1803–1882) was a British philosophical and religious author. He is best known for The Progress of the Intellect (1850). Charles Hardwick in his Christ and other Masters grouped Mackay's religious views, with those of William Johnson Fox and Theodore Parker, as falling under a heading "absolute religion".

Robert Williams Buchanan was a Scottish poet, novelist and dramatist.

Rodrigues Ottolengui was an American writer and dentist of Sephardic descent. Born in Charleston, South Carolina, he moved to New York City, where he would spend most of his adult life, in 1877.

Roger Phillip Graham was an American science fiction writer who was published most often using the name Rog Phillips, but also used other names. Of his other pseudonyms, only Craig Browning is notable in the genre. He is associated most with Amazing Stories and is known best for short fiction. He was nominated for the Hugo Award for Best Novelette in 1959.

Roger Ascham was an English scholar and didactic writer, famous for his prose style, his promotion of the vernacular, and his theories of education. He served in the administrations of Edward VI, Mary I, and Elizabeth I, having earlier acted as Elizabeth's tutor in Greek and Latin between 1548 and 1550.

Roger Bacon, OFM, also known by the scholastic accolade Doctor Mirabilis, was a medieval English philosopher and Franciscan friar who placed considerable emphasis on the study of nature through empiricism. In the early modern era, he was regarded as a wizard and particularly famed for the story of his mechanical or necromantic brazen head. He is sometimes credited as one of the earliest European advocates of the modern scientific method, along with his teacher Robert Grosseteste. Bacon applied the empirical method of Ibn al-Haytham (Alhazen) to observations in texts attributed to Aristotle. Bacon discovered the importance of empirical testing when the results he obtained were different from those that would have been predicted by Aristotle.