Obiko was described as the father of Mimatsu hime, the empress of Sujin; in the section of Suijin in the Kojiki, however, there is a description that can be interpreted that Suijin was Obiko's uncle.
大彦は、崇神の皇后御真津姫の父と記されているが、古事記の崇神の条には、崇神が大彦の叔父と読める部分がある。