Paul John Sifler (born Pavel Gerjol, December 31, 1911, Ljubljana, Slovenia – May 20, 2001, Hollywood, California, was a Slovenian composer and conductor. Paul J. Sifler was the illegitimate son of the organ builder Ivan Kacin (1884–1953) and a young singer, Terezija Gerjol. His surname was changed to Šifler when he was adopted by his stepfather and was later modified to Sifler. At the age of 11, he moved to the United States from his native Polhov Gradec. He attended the Chicago Conservatory of Music and graduated in 1940 with a degree in music composition. Sifler was an extremely prolific composer, and he is best known for his works for the organ. Many of his other titles, such as his "Slovenian Triptych for Piano" and "Three Preludes on Slovene Church Hymns" relate back his native Slove