松平定信
He was the second son of the eighth shōgun Tokugawa Yoshimune with his concubine, Okon no Kata. Munetake was considered by some as the logical choice for heir, as he was both physically fit and also well-educated. However, Yoshimune preferred the route of primogeniture, instead selecting his son Ieshige as heir. Munetake subsequently turned his attention to writing and scholarship, and set the Tayasu house apart from the other two gosankyō houses by keeping it spartan. He had several sons who were brought up in this spartan environment, one of whom was the famed reformer Matsudaira Sadanobu. His wife was Morihime, daughter of Konoe Iehisa.