Etymology and distribution of 貞安.

Sadayasu 【貞安】^{レベル3
About 400}  The Japanese surnames etymology dictionary.

Kumamoto-ken , Oosaka-fu , Yamaguchi-ken .

① Kumamoto-ken Ashikita-gun Ashikita-machi birth of Shiraki. A place name with a record since the Edo period. "Shiraki is the book" means. It is distributed in the same place.

② There is a surname including "white".

③ Korea type . Creation . Add "book" to white. There was a record of naturalization on 12th May 1958 at Niigata-ken Murakami-shi (formerly Iwafune-gun Arakawa-cho). The real name is white. 白 Haku reference.