Here is a list of names from the pronunciation tool (Factbook Headings, English list)-

The first four names are pronounced (by the software voice) "an-TEE-o-kiss"; the last two are pronounced "an-tee-OK-uss".
Is this historically-linguistically accurate, or is this a foible in the pronunciation tool?
If it is a quirk, is there a way to report the mispronunciations? And how do we know which are correct, or if all the variations are acceptable?