P. S. Rung-Keller

Paul Sophus Christian Henrik Rung-Keller or P. S. Rung-Keller (11 March 1879 – 22 March 1966) was a Danish organist and composer. 
Biography.
He was the son of lawyer Emil Keller and operatic soprano Sophie Keller; grandson of composer Henrik Rung.
He trained from 1907 at Hornemans Konservatorium operated by C. F. E. Horneman and at the Royal Danish Academy of Music from 1917. He was a student of organist Thomas Laub (1852–1927). 
He was employed as organist and cantor at the Church of Our Saviour (Danish: "Vor Frelsers Kirke") from 1903 to 1949. 
He was conductor of Cecilia Association ("Caeciliaforening") of Copenhagen from 1912-1934, a post he took over after his uncle, composer Frederik Rung. 