Some articles on shiobana:

Giorno Giovana - Story
... Born Haruno Shiobana (汐華 初流乃, Shiobana Haruno?), Giorno is the son of Dio (fathered using Jonathan Joestar's body, which logically that would make him part of the Joestar family) and a Japanese ... man, and they moved to Italy hence Haruno Shiobana became Giorno Giovana ...