Jonny Heykens (24 September 1884 – 28 June 1945) was a Dutch composer of light classical music, remembered above all for his jaunty Ständchen (Serenade) No.1 Opus 21. Heykens was born at Groningen. He was taught violin by Eugene Ysaye at the Brussels Conservatory. He played in various orchestras before founding his own orchestra in Groningen in 1914. After the First World War he toured Europe and achieved great popularity, especially in Germany. Heykens composed pieces for his orchestra, plus songs and musical comedies. His records sold widely. In the Second World War, he continued touring throughout Europe. He joined the NSB, the fascist National Socialist Party of the Netherlands. He expressed racist opinions about Jews and black people and he performed at the parties of important Nazi o