Jacob Gade, detail of a memorial plate at Vejle
Jacob Thune Hansen Gade (Vejle, Denmark, 29 November 1879 – 20 February 1963, Assens) was a Danish violinist and composer, mostly of orchestral popular music. He is remembered today for a single tune, the familiar "Jalousie", also known as Jalousie 'Tango Tzigane' and Tango Jalousie.