How many "JoJos" that are protagonists are there in the series "Jojo's Bizarre Adventure"?

There are 8 protagonists in the series "JoJo's Bizarre Adventure." The reason for this is that each part of the series focuses on a different member of the Joestar family as the main protagonist. These characters are Jonathan Joestar in Part 1: Phantom Blood, Joseph Joestar in Part 2: Battle Tendency, Jotaro Kujo in Part 3: Stardust Crusaders, Josuke Higashikata in Part 4: Diamond is Unbreakable, Giorno Giovanna in Part 5: Golden Wind, Jolyne Cujoh in Part 6: Stone Ocean, Johnny Joestar in Part 7: Steel Ball Run, and Josuke Higashikata (Alternate Universe) in Part 8: JoJolion. Each character has their own unique story and abilities, making them distinct protagonists within the series.