His name is actually John Francis Bongiovi and at the time that's what he went by. It was 3 years later he formed Bon Jovi.
Only because I hate the "that guys name was ..." format.
Also fun fact, Bon Jovi is named such because John Bongiovi wanted people to pronounce his surname correctly, the exact same thing Chef "Boy-ar-Dee" Boiardi did decades prior.