According to what I have heard, Giza is from the Egyptian 'Er-ges-her' meaning "next to the high" in reference to the pyramids. The Jesus-Giza link seems a little unlikely but I can't see anything online referring to this theory. The pyramids were built around 2500 years before Jesus so perhaps finding out whether the naming of Giza came before or after the time of Jesus would help. :)
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