The Japanese surnames etymology dictionary.
① Yamanashi-ken Nirasaki-shi Birthplace of Kiyotachi- cho folding. A place name with a record since the Warring States Period. The place name was also written as "Orii". Fukuoka-ken Fukuoka-shi Higashi-ku Shikajima is based.
② Iwate-ken Oushuu-shi Mizuzawa Masaki Origin of Oriu- cho. A place name with a record since the Edo period. Iwate-ken Morioka-shi Uchimaru was in the Edo period in the clan san Morioka of the clan government.
④ variant of 折井 . Shiga-ken Hikone-shi Kaname Town was in the Edo period in the Hikone san of the clan office. In estimation, I changed the name "Ii" of Mr. Ii, who was the same lord, as a farewell to the early Edo period.