Etymology and distribution of 南水.

Nansui 【南水】^{レベル2
About 30}  The Japanese surnames etymology dictionary.

Kouchi-ken , Shimane-ken , Hokkaidou . A variant of 佐伯 . Ooita-ken Saiki-shi Mr. Saeki (Saiki), the castle owner of Tsugumu Castle, located in Yayoi Daisuke Izaki, came to Kouchi-ken Susaki-shi Urano Inhabu in 1592 (first year of Bunraku) (Saiki) Tell her that you changed your surname. It was in the Edo period in Mie-ken Kameyama-shi . 佐伯 Saeki reference.