 His eldest son probably died early, and his second son Nangong Mao (南宫毛) inherited his title.The famous Da Yu "ding", now a national treasure of China, was cast by Nangong Kuo's grandson Yu (盂), and dedicated to him.The bronze inscription on the vessel traces Yu's lineage back to Nangong (, Duke of Nan), who is identified by scholars, including Li Xueqin and Li Feng, with Nangong Kuo.