松平容保
Matsudaira Tetsunosuke (the future Sadaaki) was born at Ichigaya in Edo, the 8th son of Matsudaira Yoshitatsu, the lord of the Takasu domain. One of his older brothers was Matsudaira Katamori, who later became the lord of Aizu. In 1859, Tetsunosuke was adopted to succeed the newly deceased Matsudaira Sadamichi as lord of the Kuwana Domain. He was betrothed to Sadamichi's 3-year-old daughter Hatsu, thus formalizing the adoption. Coming of age, he took the name Sadaaki.