However, there is another theory that he and his brother, whose name is also pronounced as 'FUJIWARA no Yoshio' but a different set of Japanese kanji (刷雄) is used for his given name, might be the same person (For details, see the article 'FUJIWARA no Yoshio [藤原刷雄]').
但し、同音異字の兄弟・藤原刷雄と同一人物ではないかとする説がある（詳細は「藤原刷雄」の項参照）。