Etymology and distribution of 湈原.

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

Niigata-ken , Hiroshima-ken , Kanagawa-ken .

① Toyama-ken Namerikawa -shi birthplace originated. A place name with a record since the Edo period.

② Hiroshima-ken Shoubara-shi Originated from the large offshore Oshiku of Yuwa Orika.

There is a story that Mr. Oe's descendant called it. Period, location unknown. There is a record in the Muromachi period. 大江 Ooe reference.