Etymology and distribution of 淵内.

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

Saitama-ken . Saitama-ken Honjou-shi Kodama-machi It was in the Edo period in Satsuki . Tell him that he was engaged in agriculture at Genji in descendents of Genji. 源 Minamoto reference.