There is an opinion that Kurikuma no Okimi was a prince of the Prince Naniwa, which is based on the description in "Shinsen Shojiroku" (New Selection and Record of Hereditary Titles and Family Names), but considering the long gap (about 80 years) between their active periods, some are dubious about their relation as a father and a son.
なお、『姓氏録』を基に栗隈王の父を難波皇子とする説が広く行われているが、二者の活動年代には隔たりが大きく（約80年）、父子関係を疑問視する向きもある。