Etymology and distribution of 桐龍.

Kiryuu 【桐龍】^{レベル1
Very rare}  The Japanese surnames etymology dictionary.

Okayama-ken Okayama-shi . Okayama-ken Okayama-shi Naka-ku Ogajima (halaoshima) is a place name with a record since the Edo period. The place name also pronounced Harajima. It is based in the same place. Hyougo - ken Sayou - gun Sayou - chou in the same place tells that Kofu surname was given by crescent moon. 国府 Kokubu reference.