His mother, a daughter of the Khan of Moghulistan, Khizr Khoja, was subsequently remarried to Umar Shaikh's younger brother Shah Rukh.
His former lands were partitioned between his siblings, with Bayqara being given an area which included Hamadan, Nahavand and Kurdistan, as well as custody of his rebellious elder brother.
[3] The second was instigated when Sa'd-i Waqqas, son of Bayqara's late cousin Muhammad Sultan, defected to the Qara Qoyunlu in the spring of 1415.
When the emperor's army arrived outside Shiraz, the inhabitants lost confidence and asked Bayqara to surrender in order to save the city from destruction, to which he relented in December 1415.
Alternatively, the biographer Dawlatshah said that the prince went voluntarily to Shah Rukh's camp in 1416, from where he was dispatched to his cousin Ulugh Beg, who later had him poisoned.
[1] There are some thoughts that the confusion regarding Bayqara's death were a result of Shah Rukh's reluctance to receive blame for it from his wife, the prince's mother Malikat Agha, who had already lost two of her sons by that point.