Etymology and distribution of 古土井.

Furudoi 【古土井】^{レベル3
About 200}  The Japanese surnames etymology dictionary.

Nagano-ken , Kanagawa-ken , Toukyou-to .

① Topography . A variant of 吉沢 . Nagano - ken Suwa - gun Hara - mura Tell her that it was Yoshizawa surname in Nakajin. Fukui-ken Sabae-shi Yaeri town was in the Edo era in the Sabae clan in the clan office.

② Topography . Add "Sawa" to Yoshi, the surname of Kagoshima-ken 's Amami archipelago. Estimated at the time of returning to Japan in 1953. 芳 Yoshi reference.

③ Korea type . Terrain . Add "Sawa" to "Ai" including those. Kyouto-fu Kyouto-shi There is a record on October 15, 1988 in Chukyo-ku. If you are a real surname. 方 Hou reference.