Etymology and distribution of 瀬戸長.

Setonaga 【瀬戸長】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Chiba-ken Kamogawa-shi · Chiba-ken Ichihara-shi . Korean type . Creation . A variant of 姜本 . Naturalized on Chiba-ken Kamogawa-shi on April 20, 1991. There is "Kamoto" in the record of naturalization. The real name is Kang. 姜 Kyou reference. 姜本 Kyoumoto reference.