Etymology and distribution of 永昜.

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

Shimane-ken , Ishikawa-ken , Kagoshima-ken Akune-shi .

① Shimane-ken Goutsu-shi Kawahei- cho Hiraide (formerly known as Hirabeda) was a place name with a record since the Edo period.

② Ishikawa-ken Suzu-shi Birth of Honjo Momopurai floor. A place name with a record since the Edo period.

③ Topography . Kagoshima - ken Akune - shi From the Hirafaku gate of the gate division system which was in the Tsurukawa area during the Edo period. The gates Hira, Toko means "flat land". In Kagoshima-ken there are examples where Hira means "cliff".