Some suggest that Iwanaga-hime is a different name of Konohanano sakuya bime who is described in "Kojiki" as a daughter of Oyamatsumi who married Susano's son, Yashimajinumi no kami in "Kojiki" (the same deity as Konohanano sakuya bime) (Iwanaga-hime was the saime deity as Konohanano sakuya bime).
また、『古事記』においてスサノオの子の八島士奴美神と結婚したオオヤマツミの娘のコノハナチルヒメは、イワナガヒメの別名であるとする説もある（コノハナノサクヤビメと同一神とする説もある）。