Mengjiang royal family was the family of Prince Demchugdongrub, the puppet ruler of Mengjiang, a part of Inner Mongolia controlled by the Japanese during the Second Sino-Japanese War.

• Demchugdongrub, Mongol prince of the Qing dynasty and ruler of Mengjiang
• Namjilvaanchig (Намжилваанчиг), Demchugdongrub's father and the chief of the Xilinguole Alliance
• Erentsoo (Эрэнцоо), Demchugdongrub's wife
• Dugarsüren (Дугарсүрэн), Demchugdongrub's son
• Batnasan (Батнасан), Demchugdongrub's daughter
• Shanqi, a distant relative of Demchugdongrub
• Kawashima Yoshiko, Shanqi's daughter