Etymology and distribution of 多門院.

Tamon'in 【多門院】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Niigata-ken Nagaoka-shi , Toukyou-to , Kanagawa-ken . A variant of 名越 . Niigata-ken Nagaoka-shi Major tradition was in the Edo period in the Echigo Nagaoka clan of the clan government office. The same clan says that he changed his name from Nagoshi surname. Estimated in the late Kamakura period, the early north and south dynasty. 名越 Nagoshi reference.