Tercüme - Portekizce-Yunanca - nomes proprios

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João is sometimes also transripted as Ζουάο (closer to the real pronounciation)

The equivalent of it in Greek is Ιωάννης (formal, not used in any remotely informal situation Ioannis) and Γιάννης (Yiannis)

The equivalent of Pedro in Greek is Πέτρος