Etymology and distribution of 月井.

Tsukii 【月井】^{レベル4
About 1,400}  The Japanese surnames etymology dictionary.

Gifu-ken Tajimi-shi , Aichi-ken Seto-shi , Oosaka-fu .

① Korea type . Originated in Incheon metropolitan area of Korea. There is a record of naturalization on Aichi-ken Seto-shi on October 26, 1961. The real name is Li. 李 Ri reference. There is a record of naturalization on Gifu - ken Toki - shi on October 21, 1977. The real name is Cai. 蔡 Sai reference.

② Okayama-ken Takahashi-shi Bichinacho Hirakawa is a place name with a record since the Edo period. Tell the place name because it was Mr. Hirakawa's territory in 1336 (3 years of Junbu and 1st year of extension). Okayama-ken is the same place of origin. 平川 Hirakawa reference.

※ Kouchi-ken Kounan-shi Kagami-machi Near Masanobe (Old: Higashikawa (Higashigawa)) is a place name with a notation of "Higashikawa" in the Kamakura period. The place is the origin.