 In 20th-century Poland, the theater-of-the-absurd playwright, novelist, painter, photographer, and philosopher Stanisław Ignacy Witkiewicz after 1925 often used the mononymous pseudonym Witkacy, a conflation of his surname ("Witkiewicz") and middle name ("Ignacy").A number of visual artists, such as Michelangelo, Titian, Tintoretto, Caravaggio and Rembrandt, are commonly known by mononyms.The modern Russian artist Erté formed his mononymous pseudonym from the initials of his actual name, as did the Belgian comics writers Hergé and Jijé.