Etymology and distribution of 入井.

Irii 【入井】^{レベル4
About 900}  The Japanese surnames etymology dictionary.

Hiroshima-ken , Tokushima-ken , Hyougo-ken .

① Convention . Abbreviation of Fujiwara. Shiga-ken Takashima-shi In Kuchiki Murai tells that descendants of Mr. Fujiwara who was in the Heian period in the same place used "Fuji" to name it. 藤原 Fujiwara reference. There is a surname including "on". In Hyougo - ken Tanba - shi tell him that he lived from the Kamakura period. Okayama-ken Tsuyama-shi Yamashita was in the Edo period in the Tsuyama clan of the clan office.

② Topography . Tokushima-ken Mima-gun Tsurugi-chou From the top of Kuudōjuu (Kudoju). Tell the place name that Mr. Fujiwara resided in the early Heian period. 藤原 Fujiwara reference.