Analysis of information sources in references of the Wikipedia article "Ismail I" in English language version.
The Safavid Shahs who ruled Iran between 1501 and 1722 descended from Sheikh Safi ad-Din of Ardabil (1252–1334). Sheikh Safi and his immediate successors were renowned as holy ascetics Sufis. Their own origins were obscure; probably of Kurdish or Iranian extraction ...
The Safawid was originally a Sufi order whose founder, Shaykh Safi al-Din, a Sunni Sufi master descended from a Kurdish family ...