Through her his father Yoritoki became the grandfather of Fujiwara no Kiyohira , the founder of the Northern Fujiwara dynasty .
a sister who married Fujiwara no Tsunekiyo .
Through sister Fujiwara no Tsunekiyo 's father Yoritoki became the grandfather of Fujiwara no Kiyohira , the founder of the Northern Fujiwara dynasty .
a sister who married Fujiwara no Tsunekiyo .