Romanization of Greek
Romanization of Greek is a way to write the Greek language (either Ancient or Modern Greek) with the Roman alphabet. That can be done by mapping either letters (called transliteration) or sounds (called transcription. The Greek name Ἰωάννης can be transliterated as Johannes, which became John in Modern English. In Modern Greek, it is generally written Γιάννης, which transliterates to Yannis. The masculine Greek word Ἅγιος or Άγιος might variously appear as Hagiοs, Agios, Aghios or Ayios, or it might simply be translated as "Holy" or "Saint" in English forms of Greek placenames.