How do you say Greek Peter?

There isn't a single, universally accepted translation of "Greek Peter." The best way to say it depends on the context and what you want to emphasize:

* Πέτρος ο Έλληνας (Péteros o Ellínas): This is a literal translation meaning "Peter the Greek." It's straightforward and accurate.

* Έλληνας Πέτρος (Ellínas Péteros): This reverses the order, putting the ethnicity first. It's also grammatically correct.

The choice between these two depends on stylistic preference. Neither is inherently "better."