Etymology and distribution of 源家.

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

Fukui-ken , Saitama-ken , Iwate-ken . Terrain . 坂上 's variant. Saitama-ken Kounosu-shi Tell the story that in the Edo era "Sakagami" was written. 坂上 Sakagami reference.