Tokugawa Ieyasu (徳川 家康, January 31, 1543–June 1, 1616) was a Japanese shogun of the Edo period. His ruled started in 1603 and ended in 1605. He is one of the most famous military commanders in Japan.
At birth, his name was Matsudaira Takechiyo.
In 1562, he changed his name to Matsudaira Motoyasu. The second syllable -- -yasu -- comes from the name of his grandfather Kiyoyasu. A few months later, he changed his first name to the one by which he is known today. The first syllable -- Ie- -- comes from the last part of the name of Minamoto Yoshile, who was a famous ancestor. He received permission from the emperor to change his family name from Matsudaira to Tokugawa.
- Nussbaum, Louis-Frédéric. (2005). "Tokugawa Ieyasu" in Japan Encyclopedia, pp. 977-978.
- Sadler, Arthur Lindsay. (2010). The Maker of Modern Japan: The Life of Tokugawa Ieyasu, p. 51.
- Sadler, p. 70.
- Janse, Marius B. (2002). The Making of Modern Japan, p. 29.