Talk:Jotaro Kujo/@comment-39738799-20190608103610/@comment-10973695-20190610103936

Josuke is a (illegimate) son of Joseph, while Jotaro is a grandson of Joseph.

Since both Holy (Jotaro's mom) and Josuke is a sibling from different mothers, and Jotaro is a son of Holy. So, Josuke is technically Jotaro's uncle.