Etymology and distribution of 古戸.

Furuto 【古戸】^{レベル4
About 1,000}  The Japanese surnames etymology dictionary.

Fukuoka-ken , Oosaka-fu , Hyougo-ken . Distribution that also contains Yabu.

① Hyougo-ken birth of adoptive adoption (Yabu) city. A place name with a record since the Heian period. Good neighbor . Hyougo-ken Kanzaki-gun Ichikawa-chou Chibara is based.

② Oosaka-fu Originated from the adopted father (Yabu) of Hirakata-shi . A place name with a record since the Heian period.

Koto 【古戸】^{レベル4
About 1,000}  The Japanese surnames etymology dictionary.

下谷 Shimotani reference.

Kodo 【古戸】^{レベル4
About 1,000}  The Japanese surnames etymology dictionary.

下坪 Shimotsubo reference.