Jonathan Zazula (born 1952), also known as Jonny Z, is the former owner of New Jersey's Rock'n Roll Heaven record store and founder of record label Megaforce Records. Zazula's record store in East Brunswick, New Jersey made him a central figure of the East Coast metal scene, regularly playing demo tapes sent to him through his underground tape-trading network which included the likes of Brian Slagel of Metal Blade Records, Ron Quintana (the editor of Metal Mania magazine), and producer Mark Whitaker. He was also somewhat of a mentor to Eddie Trunk.