Etymology and distribution of 門岩.

Kadoiwa 【門岩】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

Ehime-ken , Oosaka-fu , Yamagata-ken . Distribution that also includes Suga.

① Convention . Sugawara's abbreviation. Recorded as abbreviation of Sugawara during the Heian period. Location unknown. Ehime-ken Imabari-shi Distribution in Oimachima-cho Miyaura. 菅原 Sugawara reference.

② Abstract . Abbreviation for Suga wave. Hiroshima-ken Fukuyama-shi Tradition in Shinbashi-cho Uki Kawakita. Estimated in the Edo period. 菅波 Suganami reference.

③ Convention . Abbreviation of Kaneda. In Kagawa-ken Nakatado-gun Kotohira-chou tell him that he changed his name in 1743 (3 years of Ryosuke). 菅納 Suganou reference.

④ Fukuoka-ken Ukiha-shi Originated from Yoshii Town Takatori (formerly Kan (Suga) Township). A place name with a record since the Kamakura period. The place name was also written as "Sumo".