Christ G. Thoron, age 30, b. Greece and wife Anna L, b. in Illinois, parents born in Germany and Illinois, listed in the 1920 IL census turns out to be the only one I could find for you. Occupation is "railroader", employer is "railroad".

I could find no Christ Theodorou for you.

Did you look at the surname navigator at cyndislist.com, or try the familysearch.org website, using both the americanized and original names? You could also try geneanet.com and see if any Theodorous have registered.

Good luck?