Etymology and distribution of 阮洪.

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

Aichi-ken Nagoya-shi . Korean type . Terrain . Added "river" to Cai. Aichi-ken Nagoya-shi There is a record of naturalization on February 16, 1983 in Minato-ku. The real name is Cai. 蔡 Sai reference.