János Kőrössy (Cluj 26 December 1926 – Bucharest[1] 21 January 2013) was a Romanian jazz musician of Hungarian descent.
His first teacher was pianist and conductor Teodor Cosma, of whom he said, "I owe him everything, and for me the beginning is everything, the rest comes by itself.
"[2] Kőrössy was noted for combining the musical language typical of jazz with elements of local folk music, a trend referred to as ethno jazz.
Kőrössy's first name is spelled in many different ways: Hansel, Jancy, Jancsy, Iancsi, Yancy and Yancey.
In 1969 he moved to West Germany and subsequently relocated to the United States, settling in Atlanta, Georgia.