Bulghars 1 , the Russians (Rus) 2 , the Kosh 3 , the Khazars 4 , and from the Turks one type. And from the Romans 5 , one type.
Footnotes
1Bulghars: An ethnic group composed of various nationalities, some of Slavic origin and others of Turkic origin, who arrived through regular migrations to Bulgarian lands from neighboring countries like the Republic of Macedonia, Greece, and the Balkans. The number of Bulgarians is approximately 10 million, most of whom live in the Republic of Bulgaria. They speak the Bulgarian language, and most of them profess Christianity according to the original Orthodox sect. [They are composed of] the original Indo-European inhabitants of the Balkans whose cultural and ethnic elements have been preserved, and the original Slavs—the Indo-European inhabitants who migrated from Northeast Europe to the Balkans between the 5th and 6th centuries AD.
2Russians: They are an East Slavic ethnic group living primarily in Russia and its neighboring countries. According to 2002 statistics, the percentage of Russians in Russia is 80% (correction: the text says 96% which may be a typo for 80% or 115.8 million) of the total population. The Russians are the largest ethnic group in Europe and among the largest in the world, with 137 million ethnic Russians worldwide; 116 million live in Russia, while 18 million live in neighboring countries. Additionally, there are 3 million Russians living in other regions of the world, particularly North America and Western Europe, and to a lesser extent in Eastern Europe and Asia. The Christian religion is the dominant faith for the majority of Russians, represented by the Russian [Orthodox] Church.
3Kush: Represents the ethnicity of the indigenous inhabitants who established the Nubian civilization. Geographically, it refers to the region south of the First Cataract.
4Khazars: Nomadic Turkic people who founded a major commercial empire in southeastern Russia and Ukraine. They were a vital trade artery between Eastern Europe and Southwest Asia
5The Romans (Rum): The Byzantines or Byzantine Greeks; they are the Greek-speaking Eastern Romans and Orthodox Christians of Late Antiquity and the Middle Ages. The Romans were the primary inhabitants of the lands of the Byzantine Empire (the Eastern Roman Empire), Constantinople, Asia Minor (modern Turkey), the Greek islands, Cyprus, and parts of the southern Balkans. They formed large minorities in the coastal urban centers of the Levant and northern Egypt. Throughout their history, the Byzantine Greeks identified themselves as "Romans" (in Greek), but they are referred to as "Rum" or "Byzantine Greeks" in modern history; Latin speakers referred to them simply as "Greeks."