Iwayoshi 【岩吉】3 The Japanese surnames etymology dictionary.
② Ibaraki-ken Koga-shi Nishibiya is a place name with a record since the Sengoku period. It is distributed in the same place. Hyougo-ken Tatsuno-shi There are distribution in Shingu-machi Oya. There is 牛堂 surname in the same 牛堂 . 牛堂 reference. Kumamoto-ken Tamana-shi Distributed in talc.