Etymology and distribution of 原沼.

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

Chiba-ken Shiroi-shi · Shizuoka-ken Shizuoka-shi Shimizu-ku. Distribution including Okawa too. Sina system . There is a king in the Sina surname. There is a word of Muzunoe. 王 Ou reference.