Joshua Coffin was a historian, an American antiquary, and an abolitionist.

Josiah Flynt was an American sociologist and author.

Josiah Henson was an author, abolitionist, and minister. Born into slavery, in Port Tobacco, Charles County, Maryland, he escaped to Upper Canada in 1830, and founded a settlement and laborer's school for other fugitive slaves at Dawn, near Dresden, in Kent County, Upper Canada, of Ontario. Henson's autobiography, The Life of Josiah Henson, Formerly a Slave, Now an Inhabitant of Canada, as Narrated by Himself (1849), is believed to have inspired the title character of Harriet Beecher Stowe's 1852 novel Uncle Tom's Cabin (1852). Following the success of Stowe's novel, Henson issued an expanded version of his memoir in 1858, Truth Stranger Than Fiction. Father Henson's Story of His Own Life. Interest in his life continued, and nearly two decades later, his life story was updated and published as Uncle Tom's Story of His Life: An Autobiography of the Rev. Josiah Henson (1876).

Josiah Royce was an American Pragmatist and objective idealist philosopher and the founder of American idealism. His philosophical ideas included his joining of pragmatism and idealism, his philosophy of loyalty, and his defense of absolutism.

Josiah Tucker, also known as Dean Tucker, was a Welsh churchman, known as an economist and political writer. He was concerned in his works with free trade, Jewish emancipation and American independence. He became Dean of Gloucester.

Alfred Joyce Kilmer was an American writer and poet mainly remembered for a short poem titled "Trees" (1913), which was published in the collection Trees and Other Poems in 1914. Though a prolific poet whose works celebrated the common beauty of the natural world as well as his Roman Catholic religious faith, Kilmer was also a journalist, literary critic, lecturer, and editor. At the time of his deployment to Europe during World War I, Kilmer was considered the leading American Roman Catholic poet and lecturer of his generation, whom critics often compared to British contemporaries G. K. Chesterton (1874–1936) and Hilaire Belloc (1870–1953). He enlisted in the New York National Guard and was deployed to France with the 69th Infantry Regiment in 1917. He was killed by a sniper's bullet at the Second Battle of the Marne in 1918 at the age of 31. He was married to Aline Murray, also an accomplished poet and author, with whom he had five children.

Józef Ignacy Kraszewski was a Polish writer, publisher, historian, journalist, scholar, painter, and author who produced more than 200 novels and 150 novellas, short stories, and art reviews, which makes him the most prolific writer in the history of Polish literature. He is best known for his epic series on the history of Poland, comprising twenty-nine novels in seventy-nine parts.

Juan Antonio Llorente, ORE was a Spanish historian.

Juan Luis Vives March was a Spanish (Valencian) scholar and Renaissance humanist who spent most of his adult life in the Southern Netherlands. His beliefs on the soul, insight into early medical practice, and perspective on emotions, memory and learning earned him the title of the "father" of modern psychology. Vives was the first to shed light on some key ideas that established how psychology is perceived today.

Juan Valera y Alcalá-Galiano, was a Spanish realist author, diplomat, and politician.