I have an instrumental track called Rebecca but I don't know the artist. Does anyone have any idea who's the artist ?

Jim Mills / Butch Baldassari has an instrumental banjo track called Rebecca.
There's an orchestra instrumental by that name from the film "Psycho".
John Thomas has an instrumental piano song by that name.
Lee Konitz has a sax and electric piano(?) song by that name.

No this one is a guitar instrumental. kinda sad tone.