"Dennis Sandole" (é Dionigi Sandoli 29 September 1913 — 30 September 2000 Philadelphia) was an American virtuoso jazz guitarist, composer, and music educator from Philadelphia. He was John Coltrane’s mentor from 1946 until the early 1950s, introducing him to theory beyond chords and scales and exposing him to the music of other cultures. Mr. Sandole taught advanced harmonic techniques that were applicable to any instrument, using exotic scales and creating his own. Sandole taught privately until the end of his life.