No, your friend Antonor is not the only person (or thing) in the world with "that name spelled that particular way".
Go to
www.google.com
Type the word "Antonor" in the Google Search box and then click on the Google Search button.
You'll see a few websites spring up in which you will find things and people who bear (or at one time bore) the name of "Antonor".
-- Nanaea