Joseph "Jimmy" Rosenberg is a Dutch Sinto-Romani guitarist known for his virtuoso playing of gypsy jazz.

Ola Kvernberg is a Norwegian jazz musician known for his virtuosic string swing violin playing and his international performances. He is the son of traditional musicians Liv Rypdal Kvernberg and Torbjørn Kvernberg, and the brother of traditional musicians Kari Kvernberg Dajani and fiddler Jorun Marie Kvernberg, and grandson of the fiddler and traditional music composer Peter L. Rypdal. Kvernberg studied classical violin from the age of nine, and won 3rd prize in a great classical violin competition in Italy when he was fourteen.