Attic-Ionic

Ancient Greek in classical antiquity, before the development of the κοινή (koiné) "common" language of Hellenism, was divided into several dialects. Most of them are known only from inscriptions, but a few of them, principally Aeolic, Doric, and Ionic, are also represented in the literary canon alongside the dominant Attic form of literary Greek. Likewise, Modern Greek is divided into several dialects, most of them having been derived from Koine Greek.

Ancient Greek literature is written in literary dialects that developed from particular regional or archaic dialects. Ancient Greek authors did not necessarily write in their native dialect, but rather chose a dialect that was suitable or traditional for the type of literature they were writing (see belles-lettres). All dialects have poetry written in them, but only Attic and Ionic have full works of prose attested.

Homeric Greek is used in the first epic poems, the Iliad and the Odyssey, and the Homeric Hymns, traditionally attributed to Homer and written in dactylic hexameter. Homeric is a literary dialect with elements of Ionic, Aeolic and Arcadocypriot. Hesiod uses a similar dialect, and later writers imitate Homer in their epics, such as Apollonius Rhodius in Argonautica and Nonnus in Dionysiaca. Homer influenced other types of poetry as well.

...
Wikipedia