הגאון הקדוש מרן רבי (גרינוולד) דישקעס צבי הערשעל - rabbi Zvi Hersh Dishkes (Greenwald):

Hi Haim,
This is probably Gaon Zvi that you are looking for:

Rabbi Zvi Hirsch Horowitz, ABD Zamot

Also see private message.

Bella

hi bella,
Thank you very much, according to randy he is not his grandfather, even the years do not match (I lack one generation), I think his grandfather is:
rabbi zvi HaLevi Horowitz, a.b.d. Glilot and Zamut countries
Rabbi Zvi Hirsch Horowitz, ABD Zamot
son of
hagaon rabbi Joshua Moshe Aharon HaLevi Horowitz
son of:
rabbi Shmuel Schwartzer HaLevi Horowitz
But since it will affect many people very much, I must get a curator's approval that I am right