Greek Macedonia in the context of "Nestos (river)"

In antiquity, Paeonia or Paionia (Ancient Greek: Παιονία, romanized: Paionía) was the land and kingdom of the Paeonians (or Paionians; Ancient Greek: Παίονες, romanized: Paíones).

The exact original boundaries of Paeonia, like the early history of its inhabitants, are obscure, but it is known that it roughly corresponds to most of present-day North Macedonia and north-central parts of Greek Macedonia before the expansion of Macedon (i.e. probably the Greek municipalities of Paionia (excluding the village of Evropos), Almopia, Sintiki, Irakleia, and Serres), and a small part of south-western Bulgaria. Ancient authors placed it south of Dardania (an area corresponding to modern-day Kosovo and northern North Macedonia), west of the Thracian mountains, and east of the southernmost Illyrians. It was separated from Dardania by the mountains through which the Vardar river passes from the field of Scupi (modern Skopje) to the valley of Bylazora (near modern Sveti Nikole).

The Despotate of Epirus (Medieval Greek: Δεσποτᾶτον τῆς Ἠπείρου) was one of the Greek rump states of the Byzantine Empire established in the aftermath of the Fourth Crusade in 1204 by a branch of the Angelos dynasty. It claimed to be the legitimate successor of the Byzantine Empire during the subsequent struggle for Constantinople, along with the Empire of Nicaea and the Empire of Trebizond; its rulers briefly proclaiming themselves as Emperors in 1227–1242 (during which it is most often called the Empire of Thessalonica). The term "Despotate of Epirus" is, like "Byzantine Empire" itself, a modern historiographic convention and not a name in use at the time.

The Despotate was centred on the region of Epirus, encompassing also Albania and the western portion of Greek Macedonia and also included Thessaly and western Greece as far south as Nafpaktos. Through a policy of aggressive expansion under Theodore Komnenos Doukas the Despotate of Epirus also briefly came to incorporate central Macedonia, with the establishment of the Empire of Thessalonica in 1224, and Thrace as far east as Didymoteicho and Adrianople, and was on the verge of recapturing Constantinople and restoring the Byzantine Empire before the Battle of Klokotnitsa in 1230 where he was defeated by the Bulgarian Empire. After that, the Epirote state contracted to its core in Epirus and Thessaly, and was forced into vassalage to other regional powers. It nevertheless managed to retain its autonomy until being conquered by the restored Palaiologan Byzantine Empire in ca. 1337. In the 1410s, Carlo I Tocco, Count Palatine of Cephalonia and Zakynthos, managed to reunite the core of the Epirote state, but his successors gradually lost it to the advancing Ottoman Empire, with the last stronghold, Vonitsa, falling to the Ottomans in 1479.

Greek Muslims, also known as Grecophone Muslims, are Muslims of Greek ethnic origin whose adoption of Islam (and often the Turkish language and identity in more recent times) dates either from the contact of early Islamic caliphates with the Byzantine Empire or to the period of Ottoman rule in the southern Balkans and Anatolia. In more recent times, they consist primarily of descendants of Ottoman-era converts to Islam from Greek Macedonia (e.g., Vallahades), Crete (Cretan Muslims), and northeastern Anatolia (particularly in the regions of Trabzon, Gümüşhane, Sivas, Erzincan, Erzurum, and Kars).

Despite their ethnic Greek origin, the contemporary Grecophone Muslims of Turkey have been steadily assimilated into the Turkish-speaking Muslim population. Sizable numbers of Grecophone Muslims, not merely the elders but even young people, have retained knowledge of their respective Greek dialects, such as Cretan and Pontic Greek. Because of their gradual Turkification, as well as the close association of Greece and Greeks with Orthodox Christianity and their perceived status as a historic, military threat to the Turkish Republic, very few are likely to call themselves Greek Muslims. In Greece, Greek-speaking Muslims are not usually considered as forming part of the Greek nation.

Michael II Komnenos Doukas, Latinized as Comnenus Ducas (Greek: Μιχαήλ Β΄ Κομνηνός Δούκας, Mikhaēl II Komnēnos Doukas), often called Michael Angelos in narrative sources, was from 1230 until his death in 1266/68 the ruler of the Despotate of Epirus, which included Epirus in northwestern Greece, the western part of Greek Macedonia and Thessaly, and western Greece as far south as Nafpaktos.

The Cretan Muslims or Cretan Turks (Greek: Τουρκοκρητικοί or Τουρκοκρήτες, Tourkokritikí or Tourkokrítes; Turkish: Giritli, Girit Türkleri, or Giritli Türkler; Arabic: أتراك كريت) were the Muslim inhabitants of the island of Crete. Their descendants settled principally in Turkey, the Dodecanese Islands under Italian administration (part of Greece since 1947), Syria (notably in the village of Al-Hamidiyah), Lebanon, Palestine, Libya, and Egypt, as well as in the larger Turkish diaspora.

Cretan Muslims were descendants of ethnic Greeks who had converted to Islam after the Ottoman conquest of Crete in the seventeenth century. They identified as Greek Muslims, and were referred to as "Turks" by some Christian Greeks due to their religion; not their ethnic background. Many Cretan Greeks had converted to Islam in the wake of the Ottoman conquest of Crete. This high rate of local conversions to Islam was similar to that in Bosnia-Herzegovina, Albania, parts of western Greek Macedonia (such as the Greek Muslim Vallaades), and Bulgaria; perhaps even a uniquely high rate of conversions rather than immigrants. The Greek Muslims of Crete continued to speak Cretan Greek. European travellers' accounts note that the "Turks" of Crete were mostly not of Turkic origin, but were Cretan converts from Orthodoxy.