(1) The Haidaris (from the name haidari, "lion," given to `Ali on account of his valour) are the most advanced.
There is more than one meaning of Haidari discussed in the 1911 Encyclopedia.
So great was the influence of Sheikh Haidar, and so earnestly did he carry out the principles of conduct which had characterized his family for five generations, that his name has become, as it were, inseparable from the dynasty of his son Ismail; and the term Haidari (leonine) is applied by many persons to indicate generally the Safawids of Persia.
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