Names of the Greeks wholly different term came to establish itself in the East. The ancient people of the Middle East referred to the Hellenes as "Yunan", deriving from Persian "Yauna", itself a loan of Greek Ιωνία (Ionia), the western coast of Asia Minor. It is by affiliation with the Ionian tribe the Persians conquered in the late 6th century BC that their name extended to all Hellenes. All peoples under Persian influence adopted the term, and it is from this root that Sanskrit "Yavana" derives, which one encounters in ancient Sanskrit sources, first attested in Pāṇini's grammar, and later referring, together with Pali
Ancient Greek phonology and this cluster underwent metathesis early in the Ancient Greek period. Metathesis is likely in this case; clusters of a voiced stop and , like , do not occur in Ancient Greek, since they change to by assimilation (see below), while clusters with the opposite order, like , pronounced , do occur. Ancient grammarians, such as Aristotle in his "Poetics" and Dionysius Thrax in his Art of Grammar, categorized letters () according to what speech sounds ( 'elements') they represented. They called the letters for vowels ('pronounceable', singular ); the letters for the nasals, liquids, and , and the letters