Was Zeus a nephilim

Yes, he was!

"Most people are acquainted with the mythology of ancient Greece and Rome...Whether these gods are called Zeus or Jupiter, Poseidon, Neptune, Aphordite, Venus, Eros, or Cupid. Their sex orgies, promiscuities, cruelties and violence are all of the same cloth. And so are their offspring."

So yes, Zeus was a nephilim.

This helped us figure out that Cronos (who was a giant [which is what they translated Nephilim to in the King James Bible]), Zeus' father, was a nephilim. So, by default, so was Zeus. And so was all of Zeus' offspring. [Unless a Nephilim can only be the son of an angel and a woman...then we have many holes in our logic. But until then...]