Etymology and distribution of 當具.

Tougu 【當具】^{レベル2
About 10}  The Japanese surnames etymology dictionary.

Oosaka-fu , Saitama-ken , Gunma-ken .

① Korea type . Originated in Yeongsan County, Hwanghae North Road, Democratic People's Republic of Korea. There is a record of naturalization on Miyazaki-ken Nichinan-shi on November 30, 1960. The real name is Genkai. 玄 Gen reference.

② Korean type . Terrain . Added "mountain" to Yen. Oosaka-fu Oosaka-shi There is a record of naturalization on January 14, 1972 in Higashinari-ku. Last name is extended. 延 Nobu reference.

③ Gunma-ken Oura-gun Itakura-machi Iwata has recorded in 1806 (3rd year of culture).