Sanenobu 【實延】レベル2
About 10
The Japanese surnames etymology dictionary.
信川 reference.
2020年 9月 24日 更新
Hiroshima-ken Hatsukaichi-shi · Toukyou-to . Terrain . From Seki and the beach. Hiroshima-ken Hatsukaichi-shi Distribution exists before the district. The land faces the Seto Inland Sea. Yamaguchi-ken Kuga-gun Waki-chou Sekigahama is a place name with a record in the notation of "Sekihama" in the Kamakura period.
Jitsunobu 【實延】レベル2
About 10 are referenced.