The Name "Josuke Higashikata" (東方定助という名前,"Higashikata Jōsuke" toiu Namae) is the second volume of JoJolion and the one hundred sixth volume of the JoJo's Bizarre Adventure manga. It covers the end of the Soft & Wet story arc and most of the California King Bed story arc.
To discover his identity, the young man, alongside Yasuho, sneaked into Kira's apartment, their only clue. But, what awaited them was a Stand attack from the "man upstairs" who has not shown his appearance! Who is this man...!?
The "lion" part of JoJolion's title is a suffix that, to the best of my understanding, can mean "blessed one," "gospel," or "commemorative seal." It's an archaic suffix, and I think it stems from ancient Greece. I combined it with JoJo in order to signify the existence of Josuke, the protagonist, in this world. There's a tragic king in Greek mythology named Pygmalion, as well as a Japanese anime named Evangelion, but I'm not sure if there's any connection there.