In this Japanese name, the family name is Fujiwara.
Fujiwara no Tadamichi (藤原 忠通 , March 15, 1097 – March 13, 1164) was the eldest son of the Japanese regent (Kampaku) Fujiwara no Tadazane and a member of the politically powerful Fujiwara clan. He was the father of Fujiwara no Kanefusa and Jien.
In the Hōgen Rebellion of 1156, Tadamichi sided with the Emperor Go-Shirakawa.
The original article can be found at Fujiwara no Tadamichi and the edit history here.