Thank you for the link an information.
I will have to study that to fully understand it better.
Most Turks are actually Greek, Armenians, Arab, and others who "went Turk".
Remember that as per the Ottoman Millet system, if you converted to Islam, you were no longer classified as Greek or Armenian but as a Turk
from wikipediaRemember that BEFORE the Ottomans conquered the Greeks and the Byzantine Empire, all of the Greeks (and the Romanians) called themselve Romaoi - Romans.
In the Ottoman Empire, a millet was a separate court of law pertaining to "personal law" under which a confessional community (a group abiding by the laws of Muslim Sharia, Christian Canon law, or Jewish Halakha) was allowed to rule itself under its own laws. Despite frequently being referred to as a "system", before the nineteenth century the organization of what are now retrospectively called millets in the Ottoman Empire was far from systematic. Rather, non-Muslims were simply given a significant degree of autonomy within their own community, without an overarching structure for the 'millet' as a whole. The notion of distinct millets corresponding to different religious communities within the empire would not emerge until the eighteenth century
That's why, before becoming the Ottoman Empire, the Seljuk khaganate was called the Sultanate of the Rum (of Rome)
Many "Greeks" of today have Italian, Slavic, Illyrian genes
The millet system made a lot of people "Turks" - because the millet system until the Tenzimat reforms of the 1850s made everyone who became Muslim (sunni Muslim) to be treated one way - and these slowly moved to using Turkish (or Persian - the language of the court) and Arabic and culturally becoming Muslim
Look at pictures of Suleyman the magnificent and it is glaringly obvious that most of his genes were Slavic -- as his mother was purely slavic, his fathers mother and grandfathers mother wer Slavic too