Etymology and distribution of 瀬山.

Seyama 【瀬山】^{レベル5
About 3,000}  The Japanese surnames etymology dictionary.

Aichi-ken .

① Originated from Kanagawa-ken Yokohama-shi Tsuzuki ward (formerly Tsuzuki-gun). A place name with a record since the Nara period. Aichi-ken Nagoya-shi Honmaru Honmaru was in the Edo period in the Owarii clan in the Clan office.

② Shizuoka-ken Hamamatsu-shi Birthplace of Mikkaichi Town, Kita-ku. A place name with a record in the notation of "Tsuzuki" in the Nara era. The place name was also written as "Tsuyagi."