FUJIWARA no Kiyotsura, who possessed the title of Gon Dainagon (Provisional Major Counselor) and died from a lightening incident at Seiryoden (Emperor's private residence) in 930, was his legal son.
延長(日本)8年（930年）の清涼殿落雷事件で落命した権大納言藤原清貫は嫡男。