The were the most successful and powerful line of the Japanese Minamoto clan that were descended from Emperor Seiwa. Many of the most famous Minamoto warriors, including Minamoto no Yoshiie, also known as "Hachiman-taro", or God of War; Minamoto no Yoritomo, the founder of the Kamakura shogunate; and Ashikaga Takauji, the founder of the Ashikaga shogunate belong to this line. Tokugawa Ieyasu (1543-1616), founder of the Tokugawa shogunate, also claimed descent from this lineage. The family is named after Emperor Seiwa, grandfather of Minamoto no Tsunemoto, patriarch of the Seiwa Genji.