Etymology and distribution of 乳井.

Nyuui 【乳井】^{レベル4
About 1,600}  The Japanese surnames etymology dictionary.

Yamanashi-ken , Fukushima-ken , Toukyou-to . Thing . From the arrow. Tell the grandson of Kamakura Keikyuu, the warrior of the Heian era, that he called it. There was a story that an arrow stung in the right eye of Kamakura Keikyu with the role of three years after 1083 (3 years of Yoga) to 1087 (the first year of Kōji). 鎌倉 Kamakura reference.

※ In Yamanashi-ken Fuefuki-shi 's Ichinomiya-machi there is a belief that it was given from achievement in the era of Emperor Ninomi, the emperor of the Heian period. Emperor Ninomi's rank is from 833 (ten-year ten years) to 850 years (Jiaxiang 3 years).

Chichii 【乳井】^{レベル4
About 1,600}  The Japanese surnames etymology dictionary.

Chiba-ken Nagareyama-shi . 中桧 variant of.