Analysis of information sources in references of the Wikipedia article "Yakub Beg of Yettishar" in English language version.
Cruelty to Children Yakoob Beg.
Yakub-Beg, now of course Yakub-Padishah, is of Persian descent - i.e. in the Turkish language a Sart. (...) His birthplace was Pishad.
Mahomed Yakub Beg, a native of the village of Pishkadh, between Tashkend and Kokhan, (...) is a Tajuk, and his native language is Persian, though he now seldom speaks anything but Turkish.
Yakub-bek was born in Central Asia (city of Pskent, south of Tashkent). His father was Tadzhik. He was orphaned at an early age and was brought up by his uncle.
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: CS1 maint: location missing publisher (link) (Original from the University of California) REPRINTED FROM THE "NORTH-CHINA HERALD AND SUPREME COURT AND CONSULAR GAZETTE."