Etymology and distribution of 天筒.

Amatsutsu 【天筒】^{レベル2
About 40}  The Japanese surnames etymology dictionary.

Toyama-ken , Shiga-ken .

① Wakayama-ken Kinokawa-shi The birth of Wakayama . A place name with a record since the Kamakura period. The place name was also written as "saw watching."

② Heteromorphism of 荒海 . 荒海 Araumi reference.

Tento 【天筒】^{レベル2
About 40}  The Japanese surnames etymology dictionary.

八反田 Hattanda reference.