Mandukhai was the only daughter of Chorosbai, chingsang (grand councillor) of the Ongud Mongols in eastern Mongolia.
Mandukhai brought from hiding and adopted the seven-year-old orphan Batmunkh, son of the late Bayan Mongkhe Jonon, a direct descendant of Genghis Khan and part of the Altan Urug, who had also been killed by Esmel (Ismail).