John Arbuthnot FRS, often known simply as Dr Arbuthnot, was a Scottish physician, satirist and polymath in London. He is best remembered for his contributions to mathematics, his membership in the Scriblerus Club, and for inventing the figure of John Bull.

Dr. John Armstrong (1709–1779) was a physician, poet, and satirist. He was born at Castleton Manse, the son of Robert Armstrong, minister of Castleton, Roxburghshire, Scotland John studied medicine and gained his MD at the renowned University of Edinburgh before establishing a successful medical practice in London.

John Aubrey was an English antiquary, natural philosopher and writer. He is perhaps best known as the author of the Brief Lives, his collection of short biographical pieces. He was a pioneer archaeologist, who recorded numerous megalithic and other field monuments in southern England, and who is particularly noted for his systematic examination of the Avebury henge monument. The Aubrey holes at Stonehenge are named after him, although there is considerable doubt as to whether the holes that he observed are those that currently bear the name. He was also a pioneer folklorist, collecting together a miscellany of material on customs, traditions and beliefs under the title "Remaines of Gentilisme and Judaisme". He set out to compile county histories of both Wiltshire and Surrey, although both projects remained unfinished. His "Interpretation of Villare Anglicanum" was the first attempt to compile a full-length study of English place-names. He had wider interests in applied mathematics and astronomy, and was friendly with many of the greatest scientists of the day.

Father John Banister Tabb was an American poet, Roman Catholic priest, and professor of English.

John Baldwin Buckstone was an English actor, playwright and comedian who wrote 150 plays, the first of which was produced in 1826.

John Barbour was a Scottish poet and the first major named literary figure to write in Scots. His principal surviving work is the historical verse romance, The Brus, and his reputation from this poem is such that other long works in Scots which survive from the period are sometimes thought to be by him. He is known to have written a number of other works, but other titles definitely ascribed to his authorship, such as The Stewartis Oryginalle and The Brut (Brutus), are now lost.

John Bates Clark was an American neoclassical economist. He was one of the pioneers of the marginalist revolution and opponent to the Institutionalist school of economics, and spent most of his career as professor at Columbia University.

John William Beames was a civil servant and author in British India. He served in the Punjab from March 1859 to late 1861, and in Bengal from December 1861 until the conclusion of his service in 1893. He was also a scholar of Indian history, literature and linguistics. His great work was a comparative grammar of Indo-Aryan languages, published in three volumes in 1872–1879. When he retired from the Indian Civil Service in March 1893, he had gained extensive knowledge of Indian life, and in 1896 wrote an account of his career, first published in 1961 as Memoirs of a Bengal Civilian.

John Allyn McAlpin Berryman was an American poet and scholar. He was a major figure in American poetry in the second half of the 20th century and is considered a key figure in the "confessional" school of poetry. His best-known work is The Dream Songs.

John Brougham was an Irish and American actor, dramatist, poet, theatre manager, and author. As an actor he was celebrated for his portrayals of comic Irish characters. The author of more than seventy-five dramatic works, with some sources stating more than 150, he was particularly successful in the genres of burlesque and satire. His large output of subversive satirical stage works earned him the nickname "The American Aristophanes" among critics. In addition to his work as a playwright he published two volumes of his miscellaneous writings; including essays, poems, and other works.