Etymology and distribution of 夏間.

Natsuma 【夏間】^{レベル3
About 80}  The Japanese surnames etymology dictionary.

Mie-ken , Oosaka-fu , Wakayama-ken .

① Occupation . From being in charge of another job. Okayama-ken Tsuyama-shi Yamashita was in the Edo period in the Tsuyama clan of the clan office.

② Kagoshima-ken Aira-shi Originated from a separate river in Toyotomi's miniature. In the same era there was a separate gate in the Edo era for the division system.