Etymology and distribution of 當天.

Touten 【當天】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Hiroshima-ken , Fukushima-ken , Shiga-ken .

① Topography . From the land from the forest. Hiroshima-ken Hiroshima-shi Distributed in Shiraki cho Masuda in Akasaki-ku. There is a forest in the small story of the same place. Linde in the same place.

② Creation . Wakayama - ken Gobou - shi In Yukawa - cho Komatsubara, tell Wakayama - ken Gobou - shi from Noguchi that she added "Exit" to her family name last name. Estimated in the Edo period. 林 Hayashi reference.