Etymology and distribution of 國唯.

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

Hiroshima-ken , Kanagawa-ken , Aichi-ken . Originated from Kanagawa-ken Odawara-shi Hayakawa (Old: Kobayakawa). Place name with a record from the Heian period to the Kamakura period.

* Hiroshima-ken Fuchuu-shi In Tonomachi there was a belief that "early" was inserted as early as it was separated from Mr. Ogawa by Ogawa surname in the early Edo period. 小川 Ogawa reference.