During Part 1, Johnathan meets and marries Erina ... uncles to Joseph Joestar, and Grandpas to Jotaro Kujo. A few years later, Dio meets an American woman and two unknown women and has children ...

Jotaro Kujo is the protagonist of the third part of JoJo's Bizarre Adventure series, Stardust Crusaders. He is best known for his relaxed, calm demeanour, intelligence, and standoffishness.