Kanto Gokenin

…In the Heian period, servants who served under noble families were called 'kanin' (family vassals), but the title was also used for servants of the heads of military families, such as the Genji and Heike clans, and the character 'Go' was sometimes added as an honorific. After the Kamakura Shogunate was established, the shogun's family members were also called 'Kamakuradono no gokenin' (Kamakura-dono no gokenin) or 'Kanto gokenin' (Kanto gokenin) as honorifics, and later these titles became fixed as titles of status. When Minamoto no Yoritomo raised his army in 1180 (Jisho 4), those who quickly joined his side were the Hojo clan, who were related to him, as well as samurai who were hereditary retainers of the Genji, mainly from Izu and Sagami. …

*Some of the terminology used to refer to "Kanto Gokenin" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…平安時代，貴顕の家に隷属した従者を家人とよんだが，武門の棟梁である源氏や平家の従者についてもその称呼が用いられ，時に敬称として御の字が付された。鎌倉幕府成立後，将軍の家人も敬称として鎌倉殿の御家人，関東御家人などとよばれ，後には身分の称呼として固定化した。1180年(治承4)源頼朝の挙兵の際，いちはやく味方に馳せ参じたのは縁戚の北条氏一族のほか，伊豆･相模等を中心とした源氏譜代の家人である武士たちであった。…

※「関東御家人」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報