found: Pisʹma kalmyt︠s︡kikh khanov XVIII veka i ikh sovremennikov (1713-1771 gg.), 2009:p. 414 (Don grüb dbang puyin) p. 965 (Donduk Ombo, khan)
found: Wikipedia (7 Aug. 2012):(Donduk-Ombo Khan, 1735-1741; Donduk-Ombo, the sixth khan of the Kalmucks (reigned 1737-41))
found: Google search (7 Aug. 2012):(Donduk-Ombo khan; Donduk Ombo died in 1741; The short reign of khan Donduk-Ombo (1735-1741); appointed chief ruler of the Kalmyks by empress Anna Ioannovna in May 1735, but the khan's title was conferred on him only two years later)