Jean Louis Rodolphe Agassiz FRS (For) FRSE was a Swiss-born American biologist and geologist who is recognized as a scholar of Earth's natural history.

Louis Albert Banks was an American author and pastor. He was the Progressive nominee for Governor of Massachusetts in 1893.

Louis Bromfield was an American writer and conservationist. A bestselling novelist in the 1920s, he reinvented himself as a farmer in the late 1930s and became one of the earliest proponents of sustainable and organic agriculture in the United States. He won the Pulitzer Prize for the Novel in 1927 for Early Autumn, founded the experimental Malabar Farm near Mansfield, Ohio, and played an important role in the early environmental movement.

Louis Constant Wairy (1778–1845) was valet to Napoleon, Emperor of the French.

Louis Marie-Anne Couperus was a Dutch novelist and poet. His oeuvre contains a wide variety of genres: lyric poetry, psychological and historical novels, novellas, short stories, fairy tales, feuilletons and sketches. Couperus is considered to be one of the foremost figures in Dutch literature. In 1923, he was awarded the Tollensprijs.

Louis Figuier was a French scientist and writer. He was the nephew of Pierre-Oscar Figuier and became Professor of chemistry at L'Ecole de pharmacie of Montpellier. Louis Figuier was married to French writer Louise Juliette Bouscaren.

Louis Golding was an English writer, very famous in his time especially for his novels, though he is now largely neglected; he wrote also short stories, essays, fantasies, travel books, and poetry.

Louis Joseph Vance was an American novelist, screenwriter and film producer. He created the popular character Michael Lanyard, a criminal-turned-detective known as The Lone Wolf.

Louis Tracy (1863–1928) was a British journalist, and prolific writer of fiction. He used the pseudonyms Gordon Holmes and Robert Fraser, which were at times shared with M. P. Shiel, a collaborator from the start of the twentieth century.

Louis Preston Trimble was an American writer and academic. His published work included science fiction, westerns, mysteries, and academic non-fiction. He generally wrote as Louis Trimble, but used the pseudonym "Stuart Brock" for some of his work.