Here are some facts about kurds;"Some Kurdish tribes have given themselves Arab origins-- Arab tribes would go to the mountains, mingle with foreigners, and forget their mother tongue. These Arab genealogies may have a factual basis when we consider that the Kurds are apparently not homogeneous, but an amalgam of various ethnic elements."John Limbert, The Origins and Appearance of the Kurds in Pre-Islamic Iran, Iranian Studies, Vol.1, No.2, Spring 1968, pp. 41–51. p.42"By the time of the Arab Muslim conquests of the seventh century AD, the ethnic term Kurd was being applied to an amalgam of Iranian and Iranicized tribes, some of which may have been indigenous Kardu, but many of which were of Semetic or other ethnic origin."P.G. Kreyenbroek, S. Sperl, The Kurds: a contemporary overview, 272 pp., Routledge Publishers, 1991. p.11"Despite the fact that the Kurds speak dialects akin to Persian, they are by no means a purely Iranian people", "The development of the Kurds Iranian character was at first slow and gradual process", "The Iranization of the Zagros and the Taurus mountain ranges was brought about by the appearance of the Medes, the Persians and other Iranian peoples."W. Jwaideh, The Kurdish national movement: its origins and development, 419 pp., Syracuse University Press, 2006. p.11"Karakeçili tribe located in the southwest of Diyarbakir are kurdophone, but according to local tradition they were originally Turkmen from Western Anatolia, who had been settled in this region by Sultan Selim I after the Ottoman conquest. Their process of Kurdification must have been completed before the 18th century, for the descendants of a section of this tribe who moved to Haymana (south of Ankara) around that time also continue to speak Kurdish."M. Van Bruinessen, The Ethnic Identity of the Kurds, pp. 613–621 in Ethnic groups in Republic of Turkey, ed. by P.A. Andrews and R. Benninghaus, 664 pp., Dr. Ludwig Reichert Verlag, 1989. p.619"Some Turkish tribes living among Kurds, such as Karakeçili, Türkan and Beğdili also became Kurdish speakers."S. Mutlu, Ethnic Kurds in Turkey, International Journal of Middle East Studies, pp. 517–541, Vol.28, No.4, 1996. p.519"There can be no doubt that at a later stage certain Arab and Turkoman tribes became Kurdish by culture."D. McDowall, A Modern History of the Kurds, 515 pp., I.B. Tauris & Co., 2004. p.9"The Shabak as well as Zengana tribes are in fact descendants from the partly Turcoman shia tribes that migrated in the East of Ottoman empire and in Safavid Persia until the 17th century. Zengana traditionally lived southeast of Kirkuk and Khanaqin and they seem to have largely assimilated to their Sorani-speaking neighbors."M. Leezenberg, Gorani Influence on Central Kurdish, Substratum or Prestige Borrowing?, Conference on Bilingualism in the Iranian World, Germany, 1992"In the 1940s, a shrinking Armenian but Kurdish-speaking tribe with a tenuous grasp of Christian doctrine was noticed in central Kurdistan, where it was progressively merging with a Kurdish tribe."D. McDowall, A Modern History of the Kurds, I.B. Tauris & Co., 2004. p. 12"Many of the Dersim Kurds are partly of Armenian descent- Dersim used to have a large Armenian population. Even well before the Armenian massacres(1915), many local Armenians voluntarily assimilated, becoming Alevi Kurds".Martin Van Bruinessen, Genocide in Kurdistan?: The Suppression of the Dersim Rebellion In Turkey (1937–38) and the Chemical War Against the Iraqi Kurds (1988) in Genocide: conceptual and historical dimensions, by George J. Andreopoulos, Scholarly Book Services Inc., 2002. p. 166"One of the Kurdish tribes in the province of Sivas is possibly of Armenian origin. The Kizilbash Kurds retain certain Christian practices and sometimes call themselves Christians. There is evidence that some of the Kizilbash Kurds of Dersim came originally from Armenia".Matti Moosa, Extremist Shiites: the ghulat sects, Syracuse University Press, 1987. p. 433"Many of the Kurds of that section (Kharput) were originally of Armenian origin."Edwin Munsell Bliss, Turkey and the Armenian atrocities, Meshag Publishers, California, 1982, p. 89"Even the presence of a certain Armenian ethnic element in the bulk of the Khorasani Kurds can not be totally excluded. In my field works, while identifying villages in the district of Chenaran (between Quchan and Mashad), for instance, I came across people who were claiming to be of Armenian origin." p. 15 "Even in a superficial skimming of the language of the Khorasani Kurds, a number of important borrowings from Armenian become apparent. In the phonological system of the Khorasani Kurmanji, the Armenian trace is also visible. Also, after winnowing, when the work on the thrashing-floor is over, some groups of the Khorasani Kurds draw a cross-sign on the grain heaps cleaned from the husk, thus rendering homage to an old tradition"Abbas-Ali Madih, The Kurds of Khorasan, Iran and the Caucasus, Vol.11, 2007. p. 14"The Kurds are undoubtedly of heterogeneous origins. Many people lived in what is now Kurdistan during the past millennia and almost all of them have disappeared as ethnic or linguistic groups."M. Van Bruinessen, Agha, Shaikh and State, 373 pp., Zed Books, 1992. p.122"It is certainly not true that all tribes in Kurdistan have a common origin."M. Van Bruinessen, Agha, Shaikh and State, 373 pp., Zed Books, 1992. p.117"Books from the early Islamic era, including those containing legends like the Shahnameh and the Middle Persian Kar-Namag i Ardashir i Pabagan and other early Islamic sources provide early attestation of the term kurd in the sense of "Iranian nomads". A. The term Kurd in the Middle Persian documents simply means nomad and tent-dweller and could be attributed to any Iranian ethnic group having similar characteristics."Safrastian, Kurds and Kurdistan, The Harvill Press, 1948, p. 16 and p. 31"The term Kurd in the middle ages was applied to all nomads of Iranian origin"Wladimir Ivanon, "The Gabrdi dialect spoken by the Zoroastrians of Persia", Published by G. Bardim 1940. p. 42