Oliver Bell Bunce was an American author, editor, and playwright.

Oliver Goldsmith was a well known Anglo-Irish novelist, playwright, dramatist and poet, who is noted for his novel The Vicar of Wakefield (1766), his pastoral poem The Deserted Village (1770), and his plays The Good-Natur'd Man (1768) and She Stoops to Conquer. He is thought by some to have written the classic children's tale The History of Little Goody Two-Shoes (1765).

Oliver Herford was an Anglo-American writer, artist, and illustrator known for his pithy bon mots and skewed sense of humor.

Oliver Madox Hueffer, was an author, playwright, and war correspondent.

George Oliver Onions, who published under the name Oliver Onions, was an English writer of short stories and novels. He wrote in various genres, but is perhaps best remembered for his ghost stories, notably the collection Widdershins and the widely anthologized novella "The Beckoning Fair One". He was married to the novelist Berta Ruck.

Oliver Wendell Holmes Sr. was an American physician, poet, and polymath based in Boston. Grouped among the fireside poets, he was acclaimed by his peers as one of the best writers of the day. His most famous prose works are the "Breakfast-Table" series, which began with The Autocrat of the Breakfast-Table (1858). He was also an important medical reformer. In addition to his work as an author and poet, Holmes also served as a physician, professor, lecturer, inventor, and, although he never practiced it, he received formal training in law.

Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm Nīsābūrī, commonly known as Omar Khayyam, was a Persian polymath, known for his contributions to mathematics, astronomy, philosophy, and poetry. He was born in Nishapur, the initial capital of the Seljuk Empire. As a scholar, he was contemporary with the rule of the Seljuk dynasty around the time of the First Crusade.

Origen of Alexandria, also known as Origen Adamantius, was an early Christian scholar, ascetic, and theologian who was born and spent the first half of his career in Alexandria. He was a prolific writer who wrote roughly 2,000 treatises in multiple branches of theology, including textual criticism, biblical exegesis and hermeneutics, homiletics, and spirituality. He was one of the most influential and controversial figures in early Christian theology, apologetics, and asceticism. He has been described as "the greatest genius the early church ever produced".

Dr. Orison Swett Marden (1848–1924) was an American inspirational author who wrote about achieving success in life and founded SUCCESS magazine in 1897. His writings discuss common-sense principles and virtues that make for a well-rounded, successful life. Many of his ideas are based on New Thought philosophy.

Sir Francis Osbert Sacheverell Sitwell, 5th Baronet CH CBE was an English writer. His elder sister was Edith Sitwell and his younger brother was Sacheverell Sitwell. Like them, he devoted his life to art and literature.