Like Dashdorjiin Natsagdorj, he was a direct descendant of Genghis Khan on both his father Radnajab and mother Dulmaa's side.
His father Radnajab Bimbaev (1874-1921) was an interpreter-translator of the Manchu language at Kyakhta frontier commissariat, later in the period of the Far Eastern Republic worked as a head of public education in Chikoy aimak (district) administration, author of Russian-Mongolian and Mongolian-Russian dictionaries.