Etymology and distribution of 泙原.

Nagihara 【泙原】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Kagoshima-ken , Oosaka-fu . Terrain . "Koen" was added to the sentence which is the surname of Amagi archipelago of Kagoshima-ken . Estimated at the time of returning to Japan in 1953. 文 Bun reference.