Etymology and distribution of 三貝.

Mikai 【三貝】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

広島県、愛知県、兵庫県。サンカイも含む分布。広島県江田島市でサンカイが存在。推定では三つの貝から。広島県江田島市江田島町秋月に分布あり。同地は瀬戸内海に面した土地。

Sankai 【三貝】^{レベル3
About 70}  The Japanese surnames etymology dictionary.

Fukuoka-ken , Gifu-ken , Ooita-ken .

① There is a surname including "pine". Fukuoka-ken Kitakyuushuu-shi Yahata West District Tsunahara, Ooita-ken Kitsuki -shi Kitsuki was in the Edo era in the Kitsuki samurai of the Clan office.

② Fukuoka-ken Tagawa-gun Fukuchi-machi Originated from Suomenatsu of Ikata's small character.

③ Ishikawa-ken Nonoichi-shi Suematsu is a place name with a record since the Edo period. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office.