Minamoto is the family name.
Minamoto no Yoshitsune (源 義経?, 1159 – June 15, 1189) was a nobleman and military commander of the Minamoto clan of Japan in the late Heian and early Kamakura periods. During the Genpei War, he led a series of battles which toppled the Ise-Heishi branch of the Taira clan, helping his half-brother Yoritomo consolidate power. He is considered one of the greatest and the most popular warriors of his era, and one of the most famous samurai fighters in the history of Japan. Yoshitsune perished after being betrayed by the son of a trusted ally.
He was the nineth and youngest son son of Minamoto Yoshitomo and the third and youngest son of Yoshimoto's wife Tokiwa Gozen.Minamoto no Yoshitsune in Wikipedia