He had paternal siblings, including Minamoto no Akiko, who had the title of Takamatsuden and became the legal wife of FUJIWARA no Michinaga, and MINAMOTO no Tsunefusa (969-1023), who had the title of Shonii rank and Gon Chunagon (a provisional vice-councilor of state), who were borne by Ai no miya, the fifth daughter of Morosuke, who entered as the second wife for Takaakira after the death of Toshikata's mother.
生母の死後、高明の継室として入った師輔五女・愛宮を母とする異腹の弟妹に、藤原道長の本妻となった高松殿源明子・正二位権中納言源経房（969年-1023年）らがいる。