阿古柏
In English-language literature, the name of Yaqub Beg has also been spelt as Yakub Beg (Encyclopædia Britannica), Yakoob Beg (Boulger, 1878) or Ya`qūb Beg (Kim Hodong, 2004). Authors using Russian sources have also used the spelling Yakub-bek (Paine, 1996).