Ottoman Balkans in the context of Romanization of Ottoman Turkish

Greeks have been present in what is now southern Russia from the 6th century BC; those settlers assimilated into the indigenous populations. The vast majority of contemporary Russia's Greek minority populations are descendants of Medieval Greek refugees, traders, and immigrants (including farmers, miners, soldiers, and churchmen/bureaucrats) from the Byzantine Empire, the Ottoman Balkans, and Pontic Greeks from the Empire of Trebizond and Eastern Anatolia who settled mainly in southern Russia and the South Caucasus in several waves between the mid-15th century and the second Russo-Turkish War of 1828–29. As during the Genocide of the Pontic Greeks, the survivors fled to the Upper Pontus (in the USSR).

In former Soviet republics, about 70% are Greek speakers who are mainly descendants of Pontic Greeks from the Pontic Alps region of northeast Anatolia, 29% are Turkish-speaking Greeks (Urums) from Tsalka in Georgia, and 1% are Greek speakers from Mariupol in Ukraine.

Ottoman Greeks (Greek: Ρωμιοί, romanized: Romioi; Turkish: Osmanlı Rumları) were ethnic Greeks who lived in the Ottoman Empire (1299–1922), a large part of which is in modern Turkey, Greece and the rest of the Balkans. Ottoman Greeks were Greek Orthodox Christians who belonged to the Rum Millet (Millet-i Rum). They were concentrated in eastern Thrace (especially in and around Constantinople), and western, central, and northeastern Anatolia (especially in Smyrna, Cappadocia, and Erzurum vilayet, respectively), in Ottoman Greece and other parts of the Ottoman Balkans, and in Ottoman Cyprus. There were also sizeable Greek communities elsewhere in the Ottoman Armenia, Ottoman Syria and the Ottoman Caucasus, including in what, between 1878 and 1917, made up the Russian Caucasus province of Kars Oblast, in which Pontic Greeks, northeastern Anatolian Greeks, and Caucasus Greeks who had collaborated with the Russian Imperial Army in the Russo-Turkish War of 1828–1829 were settled in over 70 villages, as part of official Russian policy to re-populate with Orthodox Christians an area that was traditionally made up of Ottoman Muslims and Armenians.

Ottoman Greeks (Greek: Ρωμιοί, romanized: Romioi; Turkish: Osmanlı Rumları) were ethnic Greeks who lived in the Ottoman Empire (1299–1922), a large part of which is in modern Turkey, Greece and the rest of the Balkans. Ottoman Greeks were Greek Orthodox Christians who belonged to the Rum Millet (Millet-i Rum). They were concentrated in eastern Thrace (especially in and around Constantinople), and western, central, and northeastern Anatolia (especially in Aidin vilayet, Hüdavendigâr vilayet, Konya vilayet, and Trebizond vilayet, respectively), in Ottoman Greece and other parts of the Ottoman Balkans, and in Ottoman Cyprus. There were also sizeable Greek communities elsewhere in the Ottoman Armenia, Ottoman Syria and the Ottoman Caucasus, including in what, between 1878 and 1917, made up the Russian Caucasus province of Kars Oblast, in which Pontic Greeks, northeastern Anatolian Greeks, and Caucasus Greeks who had collaborated with the Russian Imperial Army in the Russo-Turkish War of 1828–1829 were settled in over 70 villages, as part of official Russian policy to re-populate with Orthodox Christians an area that was traditionally made up of Ottoman Muslims and Armenians.

The kodjabashis (Greek: κοτζαμπάσηδες, romanized: kotzabasides; singular κοτζάμπασης, kotzabasis; Serbo-Croatian: kodžobaša, kodžabaša; from Turkish: kocabaṣı, lit. 'office holder' from Turkish: koca, lit. 'big' and Turkish: baṣ, lit. 'head') were local Christian notables in parts of the Ottoman Balkans, most often referring to Ottoman Greece and especially the Peloponnese. They were also known in Greek as proestoi or prokritoi (προεστοί/πρόκριτοι, "primates") or demogerontes (δημογέροντες, "elders of the people"). In some places they were elected (such in the islands for example), but, especially in the Peloponnese, they soon became a hereditary oligarchy, who exercised considerable influence and held posts in the Ottoman administration.

The title was also present in Ottoman Serbia and Bosnia, where it was known as starešina ("elder, chief") instead of the official Turkish name. The terms chorbaji (from Turkish çorbacı) and knez (a Slavic title) were also used for this type of primates, in Bulgaria and Serbia respectively.