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The Three Lords (''sankyô'' 三卿), Tayasu, Hitotsubashi, and Shimizu, were descended from two sons and a grandson of the shogun [[Tokugawa Yoshimune]].

The Three Lords (''sankyô'' 三卿), Tayasu, Hitotsubashi, and Shimizu, were descended from two sons and a grandson of the shogun [[Tokugawa Yoshimune]].

Others, called "Within the Gate" (''kamon'' 家門）were descendants of sons of the first three shoguns and branches of the Three Houses, such as the daimyo of Fukui (Echien), Mastue, Saijô (in [[Iyo province]]), Aizu, and Takamatsu.  

Others, called "Within the Gate" (''kamon'' 家門）were descendants of sons of the first three shoguns and branches of the Three Houses, such as the daimyo of Fukui (Echien), Matsue, Saijô (in [[Iyo province]]), Aizu, and Takamatsu.  

When the main shogunal house lacked an heir, one was to be chosen from the Three Houses or from the Three Lords. This happened three times. When they became shogun, Yoshimune and [[Tokugawa Iemochi|Iemochi]] were the daimyo of Kii, and [[Tokugawa Yoshinobu|Yoshinobu]] was head of the Hitotsubashi house. (Yoshinobu was originally of the Mito clan, but had been adopted as heir of the Hitotsubashi house.)

When the main shogunal house lacked an heir, one was to be chosen from the Three Houses or from the Three Lords. This happened three times. When they became shogun, Yoshimune and [[Tokugawa Iemochi|Iemochi]] were the daimyo of Kii, and [[Tokugawa Yoshinobu|Yoshinobu]] was head of the Hitotsubashi house. (Yoshinobu was originally of the Mito clan, but had been adopted as heir of the Hitotsubashi house.)

The heads of the Three Houses and the Three Lords and their heirs were allowed to use the name "Tokugawa." Shinpan daimyo of other houses and younger sons of the heads of the Three Houses used the name "Matsudaira."  

The heads of the Three Houses and the Three Lords and their heirs were allowed to use the name "Tokugawa." Shinpan daimyo of other houses and younger sons of the heads of the Three Houses used the name "Matsudaira."

==Notes==

==Notes==