J. R. R. Tolkien
John Ronald Reuel Tolkien, CBE (pronounced /ˈtɒlkiːn/) (3 January 1892 – 2 September 1973) was an English writer, poet, philologist, and university professor, best known as the author of the high fantasy classic works The Hobbit, The Lord of the Rings and The Silmarillion.
Tolkien is perhaps the most famous artlanger of all times and has been called "the Beethoven of conlanging". His most famous conlangs are the Quendian (Elvish) languages Quenya and Sindarin, the Dwarven tongue Khuzdul, the Mannish language Adûnaic, and Black Speech, the language of Sauron and his minions. Tolkien can be credited to be the inventor of the diachronic method of conlanging which was already in evidence in his earliest writings on the Quendian languages c. 1918.