Julian Priester is an American jazz trombonist and occasional euphoniumist. He is sometimes credited "Julian Priester Pepo Mtoto". He has played with Sun Ra, Max Roach, Duke Ellington, John Coltrane, and Herbie Hancock.

Le Sony'r Ra, better known as Sun Ra, was an American jazz composer, bandleader, piano and synthesizer player, and poet known for his experimental music, "cosmic" philosophy, prolific output, and theatrical performances. For much of his career, Ra led The Arkestra, an ensemble with an ever-changing name and flexible line-up.