From the evidence available at the present time, it is certain that the Safavid family was of indigenous Iranian stock, and not of Turkish ancestry as it is sometimes claimed. It is probable that the family originated in Persian Kurdistan, and later moved to Azerbaijan, where they adopted the Azari form of Turkish spoken there, and eventually settled in the small town of Ardabil sometimes during the eleventh century.
By the time of the establishment of the Safavid empire, the members of the family were Turkicized and Turkish-speaking, and some of the Shahs composed poems in their then-native Turkish language. Concurrently, the Shahs themselves also supported Persian literature, poetry and art projects including the grand Shahnameh of Shah Tahmasp, while members of the family and some Shahs composed Persian poetry as well.
The authority of the Safavids was religiously based, and their claim to legitimacy was founded on being direct male descendants of Ali, the cousin and son-in-law of Muhammad, and regarded by the Shiʻa as the first Imam.
Furthermore, the dynasty was from the very start thoroughly intermarried with both Pontic Greek as well as Georgian lines. In addition, from the official establishment of the dynasty in 1501, the dynasty would continue to have many intermarriages with both Circassian as well as again Georgian dignitaries, especially with the accession of Tahmasp I.
The Safavid family was a literate family from its early origin. There are extant Tati and Persian poetry from Shaykh Safi ad-din Ardabili as well as extant Persian poetry from Shaykh Sadr ad-din. Most of the extant poetry of Shah Ismail I is in Azerbaijani pen-name of Khatai. Sam Mirza, the son of Shah Ismail as well as some later authors assert that Ismail composed poems both in Turkish and Persian but only a few specimens of his Persian verse have survived. A collection of his poems in Azeri were published as a Divan. Shah Tahmasp who has composed poetry in Persian was also a painter, while Shah Abbas II was known as a poet, writing Azerbaijani verses. Sam Mirza, the son of Ismail I was himself a poet and composed his poetry in Persian. He also compiled an anthology of contemporary poetry.
Matthee, Rudi. (2005). The Pursuit of Pleasure: Drugs and Stimulants in Iranian History, 1500-1900. Princeton University Press. p. 18; "The Safavids, as Iranians of Kurdish ancestry and of nontribal background (...)".
^Anthony Bryer. "Greeks and Türkmens: The Pontic Exception", Dumbarton Oaks Papers, Vol. 29 (1975), Appendix II "Genealogy of the Muslim Marriages of the Princesses of Trebizond"
^Why is there such confusion about the origins of this important dynasty, which reasserted Iranian identity and established an independent Iranian state after eight and a half centuries of rule by foreign dynasties? RM Savory, Iran under the Safavids (Cambridge University Press, Cambridge, 1980), p. 3.
^Alireza Shapur Shahbazi (2005), "The History of the Idea of Iran", in Vesta Curtis ed., Birth of the Persian Empire, IB Tauris, London, p. 108: "Similarly the collapse of Sassanian Eranshahr in AD 650 did not end Iranians' national idea. The name "Iran" disappeared from official records of the Saffarids, Samanids, Buyids, Saljuqs and their successor. But one unofficially used the name Iran, Eranshahr, and similar national designations, particularly Mamalek-e Iran or "Iranian lands", which exactly translated the old Avestan term Ariyanam Daihunam. On the other hand, when the Safavids (not Reza Shah, as is popularly assumed) revived a national state officially known as Iran, bureaucratic usage in the Ottoman empire and even Iran itself could still refer to it by other descriptive and traditional appellations".
^In the pre-Safavid written work Safvat as-Safa (oldest manuscripts from 1485 and 1491), the origin of the Safavids is tracted to Piruz Shah Zarin Kolah who is called a Kurd from Sanjan, while in the post-Safavid manuscripts, this portion has been excised and Piruz Shah Zarin Kollah is made a descendant of the Imams. R Savory, "Ebn Bazzaz" in Encyclopædia Iranica). In the Silsilat an-nasab-i Safawiya (composed during the reign of Shah Suleiman, 1667–94), by Hussayn ibn Abdal Zahedi, the ancestry of the Safavid was purported to be tracing back to Hijaz and the first Shiʻi Imam as follows: Shaykh Safi al-din Abul Fatah Eshaq ibn (son of) Shaykh Amin al-Din Jabrail ibn Qutb al-din ibn Salih ibn Muhammad al-Hafez ibn Awad ibn Firuz Shah Zarin Kulah ibn Majd ibn Sharafshah ibn Muhammad ibn Hasan ibn Seyyed Muhammad ibn Ibrahim ibn Seyyed Ja'afar ibn Seyyed Muhammad ibn Seyyed Isma'il ibn Seyyed Muhammad ibn Seyyed Ahmad 'Arabi ibn Seyyed Qasim ibn Seyyed Abul Qasim Hamzah ibn Musa al-Kazim ibn Ja'far As-Sadiq ibn Muhammad al-Baqir ibn Imam Zayn ul-'Abedin ibn Hussein ibn Ali ibn Abi Taleb Alayha as-Salam. There are differences between this and the oldest manuscript of Safwat as-Safa. Seyyeds have been added from Piruz Shah Zarin Kulah up to the first Shiʻi Imam and the nisba "Al-Kurdi" has been excised. The title/name "Abu Bakr" (also the name of the first Caliph and highly regarded by Sunnis) is deleted from Qutb ad-Din's name. ُSource: Husayn ibn Abdāl Zāhedī, 17th cent. Silsilat al-nasab-i Safavīyah, nasabnāmah-'i pādishāhān bā ʻuzmat-i Safavī, ta'līf-i Shaykh Husayn pisar-i Shaykh Abdāl Pīrzādah Zāhedī dar 'ahd-i Shāh-i Sulaymnān-i Safavī. Berlīn, Chāpkhānah-'i Īrānshahr, 1343 (1924), 116 pp. Original Persian: شیخ صفی الدین ابو الفتح اسحق ابن شیخ امین الدین جبرائیل بن قطب الدین ابن صالح ابن محمد الحافظ ابن عوض ابن فیروزشاه زرین کلاه ابن محمد ابن شرفشاه ابن محمد ابن حسن ابن سید محمد ابن ابراهیم ابن سید جعفر بن سید محمد ابن سید اسمعیل بن سید محمد بن سید احمد اعرابی بن سید قاسم بن سید ابو القاسم حمزه بن موسی الکاظم ابن جعفر الصادق ابن محمد الباقر ابن امام زین العابدین بن حسین ابن علی ابن ابی طالب علیه السلام.
^R.M. Savory, "Safavid Persia" in: Ann Katherine Swynford Lambton, Peter Malcolm Holt, Bernard Lewis, The Cambridge History of Islam, Cambridge University Press, 1977. p. 394: "They (Safavids after the establishment of the Safavid state) fabricated evidence to prove that the Safavids were Sayyids."
^F. Daftary, "Intellectual Traditions in Islam", I.B.Tauris, 2001. p. 147: "But the origins of the family of Shaykh Safi al-Din go back not to Hijaz but to Kurdistan, from where, seven generations before him, Firuz Shah Zarin-kulah had migrated to Adharbayjan"
^Tamara Sonn. A Brief History of Islam, Blackwell Publishing, 2004, p. 83, ISBN1-4051-0900-9
^É. Á. Csató, B. Isaksson, C Jahani. Linguistic Convergence and Areal Diffusion: Case Studies from Iranian, Semitic and Turkic, Routledge, 2004, p. 228, ISBN0-415-30804-6.
^Minorsky, V (2009). "Adgharbaydjan (Azarbaydjan)". In Berman, P; Bianquis, Th; Bosworth, CE; van Donzel, E; Henrichs, WP (eds.). Encyclopedia of Islam (2nd ed.). NL: Brill. Archived from the original on 2012-07-28. After 907/1502, Adharbayjan became the chief bulwark and rallying ground of the Safawids, themselves natives of Ardabil and originally speaking the local Iranian dialect
^Roger M. Savory. "Safavids" in Peter Burke, Irfan Habib, Halil İnalcık: History of Humanity-Scientific and Cultural Development: From the Sixteenth to the Eighteenth Century, Taylor & Francis. 1999, p. 259.
^Savory, Roger (2007). Iran Under the Safavids. Cambridge University Press. p. 213. ISBN978-0-521-04251-2. qizilbash normally spoke Azari brand of Turkish at court, as did the Safavid shahs themselves; lack of familiarity with the Persian language may have contributed to the decline from the pure classical standards of former times
^Safavid dynasty at Encyclopædia Iranica, "The origins of the Safavids are clouded in obscurity. They may have been of Kurdish origin (see R. Savory, Iran Under the Safavids, 1980, p. 2; R. Matthee, "Safavid Dynasty" at iranica.com), but for all practical purposes they were Turkish-speaking and Turkified."
^John L. Esposito, The Oxford History of Islam, Oxford University Press US, 1999. pp 364: "To support their legitimacy, the Safavid dynasty of Iran (1501–1732) devoted a cultural policy to establish their regime as the reconstruction of the historic Iranian monarchy. To the end, they commissioned elaborate copies of the Shahnameh, the Iranian national epic, such as this one made for Tahmasp in the 1520s."
^Ira Marvin Lapidus, A history of Islamic Societies, Cambridge University Press, 2002, 2nd ion. pg 445: To bolster the prestige of the state, the Safavid dynasty sponsored an Iran-Islamic style of culture concentrating on court poetry, painting, and monumental architecture that symbolized not only the Islamic credentials of the state but also the glory of the ancient Persian traditions."
^Colin P. Mitchell, "Ṭahmāsp I" in Encyclopædia Iranica. "Shah Ṭahmāsp's own brother, Sām Mirzā, wrote the Taḏkera-yetoḥfa-ye sāmi, in which he mentioned 700 poets during the reigns of the first two Safavid rulers. Sām Mirzā himself was an ardent poet, writing 8,000 verses and a Šāh-nāma dedicated to his brother, Ṭahmāsp (see Sām Mirzā, ed. Homāyun-Farroḵ, 1969)."
^See: Willem Floor, Hasan Javadi(2009), The Heavenly Rose-Garden: A History of Shirvan & Daghestan by Abbas Qoli Aqa Bakikhanov, Mage Publishers, 2009. (see Sections on Safavids quoting poems of Shah Tahmasp I)
^Kathryn Babayan, Mystics, Monarchs and Messiahs: Cultural Landscapes of Early Modern Iran, Cambridge, Massachusetts; London : Harvard University Press, 2002. p. 143: "It is true that during their revolutionary phase (1447–1501), Safavi guides had played on their descent from the family of the Prophet. The hagiography of the founder of the Safavi order, Shaykh Safi al-Din Safvat al-Safa written by Ibn Bazzaz in 1350-was tampered with during this very phase. An initial stage of revisions saw the transformation of Safavi identity as Sunni Kurds into Arab blood descendants of Muhammad."
^From Maternal side: Chatrina daughter of Theodora daughter of John IV of Trebizond son of Alexios IV of Trebizond son of Manuel III of Trebizond son of Alexios III of Trebizond son of Irene Palaiologina of Trebizond. From Paternal side: Shaykh Haydar son of Khadijeh Khatoon daughter of Ali Beyg son of Qara Yuluk Osman son of Maria daughter of Irene Palaiologina of Trebizond.
^V. Minorsky, "The Poetry of Shāh Ismā‘īl I", Bulletin of the School of Oriental and African Studies, University of London 10/4 (1942): 1006–53.
Christoph Marcinkowski (tr.),Persian Historiography and Geography: Bertold Spuler on Major Works Produced in Iran, the Caucasus, Central Asia, India and Early Ottoman Turkey, Singapore: Pustaka Nasional, 2003, ISBN9971-77-488-7.
Christoph Marcinkowski (tr., ed.),Mirza Rafi‘a's Dastur al-Muluk: A Manual of Later Safavid Administration. Annotated English Translation, Comments on the Offices and Services, and Facsimile of the Unique Persian Manuscript, Kuala Lumpur, ISTAC, 2002, ISBN983-9379-26-7.
Christoph Marcinkowski,From Isfahan to Ayutthaya: Contacts between Iran and Siam in the 17th Century, Singapore, Pustaka Nasional, 2005, ISBN9971-77-491-7.