Rio de Gregori (22 September 1919, in Zürich – 22 May 1987, in Munich) was a Swiss jazz pianist.
He worked with of Willy Mac Allen (1939–1940), James Boucher (1940–1941), Jo Grandjean (1942)[2] and René Weiss (until 1944).
[3] During the war he played with Fred Böhler until 1945 when he founded a big band of his own which included Flavio Ambrosetti[4] and Stuff Combe.
[5] When his band broke up, he still worked as both a trio and soloist and he managed a bar in Ascona, Switzerland.
He settled, later, in Munich and opened a night club there, Bar Ascona, and called himself Rio Gregory.