How do you write john in Greek?

There isn't a single, perfect way to write "John" in Greek, as it depends on the transliteration system used and the desired level of accuracy. Here are a few options:

* Ιωάννης (Iōánnēs): This is the most common and traditional form, representing the full, formal Greek name.

* Ιωάννας (Iōánnas): This is a less formal, shorter version, primarily used as a given name. It's a genitive form, and therefore not perfectly equivalent to "John," but commonly understood as such.

* Γιάννης (Giánnēs): This is a common, familiar diminutive form, used widely in everyday conversation. It's closer to a nickname.

So, the best choice depends on the context. For formal writing, Ιωάννης is best. For informal settings or dialogue, Γιάννης might be more appropriate.