violinist

n. one who plays the violin; one who plays a kind of stringed musical instrument which is played with a bow

A violinist is an instrumentalist who plays the violin. The terms fiddler or fiddle player are also used. In classical music, the "fiddle" terms are usually used somewhat informally or in a joking manner, but they are more standard expressions in folk music. In between there are nuances of meaning and usage which are difficult to formalize.
See more at Wikipedia.org...

Noun
1. a musician who plays the violin
(synonym) fiddler
(hypernym) musician, instrumentalist, player
(hyponym) Enesco, Georges Enesco, George Enescu

(n.)
A player on the violin.
  

violinist