"Helen is eating this orange."
Translation:Η Ελένη τρώει αυτό το πορτοκάλι.
Is the eeta part of the name, of is that the definite article "the"?
Is this literally says "The Helen"?
Yes, names in Greek always require an article. The definite one, most of the times. The indefinite is used when you want to talk about a Helen out there that you or the person you are talking to don't know. F.e: i meet a (woman named) Helen today, who is very beautiful.= συνάντησα μια Ελένη σήμερα που είναι πολύ όμορφη.