You would be better off asking a linguistics or Egyptian expert than this board, which is primarily for people names rather than place names.
However, as an archaeologist, I find that Giza-Jesus thing *highly* unlikely. Was the book written by someone who was clearly taking a Christian look at the pyramids?
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.