He was raised by FUJIWARA no Bokushi (also pronounced as FUJIWARA no Atsuko and the wife of Masanobu) after the death of Masanobu ("Eiga Monogatari"(A Tale of Flowering Fortunes), Volume 12).
そして雅信の死後は藤原穆子（雅信の室）に養育された（『栄花物語』巻12）。