Josias Simmler was a Swiss theologian and classicist, author of the first book relating solely to the Alps.

Josias Weitbrecht was a German professor of medicine and anatomy in Russia.

Josif Jovan Bageri was an educator, poet and Albanian nationalist figure.

Josip Kozarac (18 March 1858 – 21 August 1906) was a Croatian writer.

Josip Novakovich is a Croatian Canadian writer.

Josip Stritar was a Slovene writer, poet, essayist, the first aesthetic critic, playwright, publisher and translator.

Josip Vandot was a Slovene writer and poet who wrote mainly for young readers.

Joss Sheldon is an author who has released five novels; Individutopia (2018), Money Power Love (2017), The Little Voice (2016), Occupied (2015) and Involution & Evolution (2014). He released his first work of non-fiction, DEMOCRACY: A User's Guide, in 2020.

Joseph Hill Whedon is an American screenwriter, director, producer and comic book writer. He is the founder of Mutant Enemy Productions, co-founder of Bellwether Pictures, and is best known as the creator of several television series: the supernatural drama Buffy the Vampire Slayer (1997–2003) and its spinoff Angel (1999–2004), the short-lived space Western Firefly (2002), the Internet musical miniseries Dr. Horrible's Sing-Along Blog (2008), the science fiction drama Dollhouse (2009–2010), the Marvel Cinematic Universe series Agents of S.H.I.E.L.D. (2013–2020), and the science fiction drama The Nevers (2021).

Jostein Gaarder (Norwegian: [ˈjùːstæɪn ˈɡòːɖər]; born 8 August 1952) is a Norwegian intellectual and author of several novels, short stories, and children's books. Gaarder often writes from the perspective of children, exploring their sense of wonder about the world. He often utilizes metafiction in his works and constructs stories within stories. His best known work is the novel Sophie's World: A Novel About the History of Philosophy (1991). It has been translated into 60 languages; there are over 40 million copies in print.