Tokugawa Ieyasu
Tadazane was the son of (1569–1615) with Toku-hime, daughter of Matsudaira Nobuyasu and granddaughter of Tokugawa Ieyasu. He married Kamehime, daughter of Honda Tadamasa with Kamehime (daughter of Matsudaira Nobuyasu) and adopted daughter of Tokugawa Ieyasu.