Etymology and distribution of 成井.

Narui 【成井】^{レベル5
About 2,500}  The Japanese surnames etymology dictionary.

Aichi-ken , Aomori-ken , Ibaraki-ken .

① things . From the ship. In Aichi-ken Chita-gun Agui-chou Miyazu aimed for the welfare of Tokugawa Ieyasu, a warrior of the Sengoku period, Azuchi-Momoyama period, Edo era in 1582 (Tensho 10 years) or 1596 to 1615 (Keicho year) Tell him that you gave it. There are stories that the head family called Shinkai surname, and the branch was referring to Funabashi surname. 新海 Shinkai reference.

② Birth of Chiba-ken Funabashi (Funabashi) city. A place name with a record since the Kamakura period.

③ variant of 舟橋 .

Narii 【成井】^{レベル5
About 2,500}  The Japanese surnames etymology dictionary.

Chiba-ken Ooamishirasato-shi . Variant of the 船所 .