It's commonly believed that a group of Cuman-Kipchaks who headed to the Balkans as a result of the Mongol incursions into the Desht-i Qipchaq lands; it is known that they entered the service of the Latin and Nicaea Empires. The Empire of Nicea used this Cuman group as Turcopoles against the Seljuk and Mongol threats from the East and settled it in their lands. This Cuman-Kipchak group interbred with the local Byzantines who had been mixed with Slavs and later with Oghuz Turks, forming the people called Manav.
↑IV-XVIII. Yüzyıllarda Karadeniz Kuzeyindeki Türk Kavimleri ve Devletleri [IV-XVIII. Turkic Tribes and States in the North of the Black Sea in the IV-XVIII. Centuries], Akdes Nimet Kurat, Ankara, 1972, pp 83–84. (in Turkish).
1 Central Asian (i.e. Turkmeni, Afghani and Iranian) Turkmens, distinct from Levantine (i.e. Iraqi and Syrian) Turkmen/Turkoman minorities, who mostly adhere to an Ottoman-Turkish heritage and identity, and Akto Turkmen, who mostly adhere to a Kyrgyz heritage and identity.
2 In traditional areas of Turkish settlement (i.e. former Ottoman territories).