Etymology and distribution of 古久澤.

Kokuzawa 【古久澤】^{レベル2
About 20}  The Japanese surnames etymology dictionary.

Fukui-ken , Hokkaidou , Shizuoka-ken . Terrain . From the land sticking out of the swamp. Fukui-ken Nanjou-gun Minamiechizen-chou Utsuo, Fukui-ken Sakai-shi Maruoka-cho Akasaka, Toyama-ken Uodzu-shi It was in the Edo era in Pyeongtaek. Ishikawa-ken Kanazawa-shi Marunouchi was in the Edo era at the Kaga clan in the Clan office. Good neighbor . Nagano-ken Hanishina-gun Sakaki-machi Nanjo is based.

※ Miyagi-ken Sendai-shi Aoba-ku Kawauchi was in the Edo era in the Sendai Samurai of the Clan office. The same clan says that he changed his name from Akasawa 's surname. 赤沢 Akazawa reference.