Clifford Donald Simak was an American science fiction writer. He won three Hugo Awards and one Nebula Award. The Science Fiction Writers of America made him its third SFWA Grand Master, and the Horror Writers Association made him one of three inaugural winners of the Bram Stoker Award for Lifetime Achievement.

Clifford Whittingham Beers was the founder of the American mental hygiene movement.

Clinton Scollard (1860–1932) was an American poet and writer of fiction. He was a Professor of English at Hamilton College.

William Clyde Fitch was an American dramatist, the most popular writer for the Broadway stage of his time.

Sidonie-Gabrielle Colette, known mononymously as Colette, was a French author and woman of letters. She was also a mime, actress, and journalist. Colette is best known in the English-speaking world for her 1944 novella Gigi, which was the basis for the 1958 film and the 1973 stage production of the same name. Her short story collection The Tendrils of the Vine is also famous in France.

Colley Cibber was an English actor-manager, playwright and Poet Laureate. His colourful memoir Apology for the Life of Colley Cibber (1740) describes his life in a personal, anecdotal and even rambling style. He wrote 25 plays for his own company at Drury Lane, half of which were adapted from various sources, which led Robert Lowe and Alexander Pope, among others, to criticise his "miserable mutilation" of "crucified Molière [and] hapless Shakespeare".

Sir Edward Montague Compton Mackenzie, was a Scottish writer of fiction, biography, histories and a memoir, as well as a cultural commentator, raconteur and lifelong Scottish nationalist. He was one of the co-founders in 1928 of the National Party of Scotland along with Hugh MacDiarmid, R. B. Cunninghame Graham and John MacCormick. He was knighted in 1952.

Kǒng Fūzǐ, commonly Latinized as Confucius, was a Chinese philosopher and politician of the Spring and Autumn period who is traditionally considered the paragon of Chinese sages. Confucius's teachings and philosophy underpin East Asian culture and society, remaining influential across China and East Asia to this day. His philosophical teachings, called Confucianism, emphasized personal and governmental morality, correctness of social relationships, justice, kindness, and sincerity.

Coningsby Dawson was an Anglo-American novelist and soldier of the Canadian Field Artillery, born at High Wycombe, Buckinghamshire, England.

Conrad Potter Aiken was an American writer and poet, honored with a Pulitzer Prize and a National Book Award, and was United States Poet Laureate from 1950 to 1952. His published works include poetry, short stories, novels, literary criticism, a play, and an autobiography.