Complex sentence: Early in his public school education, Mayfield befriended fellow schoolmate Jason Marsalis, who is the son of jazz pianist Ellis Marsalis, and is brother to fellow jazz musicians Branford Marsalis, Wynton Marsalis and Delfeayo Marsalis.
Split into simpler sentences: Early in his public school education, Mayfield befriended fellow schoolmate Jason Marsalis. Jason is the son of jazz pianist Ellis Marsalis, and brother to fellow jazz musicians Branford Marsalis, Wynton Marsalis and Delfeayo Marsalis.