Ooashi 【大芦】4 The Japanese surnames etymology dictionary.
① Topography . Hiroshima-ken Hiroshima-shi Naka-ku Kamamachi was in the Edo period in the Hiroshima samurai of the Clan office. Tell the same clan that Hyougo - ken Himeji - shi 's nettle comes out. Yamagata-ken Yamagata-shi In Muromachi, the vassal of Shigeru Honjo who is a warrior of warring States era carried out military service in the battle of Kawanakajima in Nagano-ken Nagano-shi from 1553 (astronomy 22 years) to 1564 (Eikoku 7 years) Tells that Kawanakajima was given the official name because it is a land surrounded by Saikawa and Chikumagawa river water. Kouchi-ken Tosashimizu-shi was in the Edo period. Kouchi-ken Takaoka-gun Nakatosa-chou Meiji New surname that monks attached to fishermen in Kamijoji .
② Originated from Okinoerabujima in the Amami archipelago of Kagoshima-ken . It was in the Edo period in the same place. One letter surname of Amagi archipelago of Kagoshima-ken which used "Oki" of Okinoerabu.