Etymology and distribution of 児泉.

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

Gifu-ken Ibi-gun Ikeda-chou , Kumamoto-ken Ashikita-gun Ashikita-machi . Terrain . From heron and village. Nagasaki - ken Minamishimabara - shi Tell the story that at the famous temple of Shogunji Temple of the Jodo Shin Buddhist in Aioi, it was called Meiji New Last Name in 1872 because there were many herons in the area. There are also stories that the shogunate was Sasaki at the temple. 佐々木 Sasaki reference.