Nakaiso 【中磯】3 The Japanese surnames etymology dictionary.
① Topography . From Hara and the favorite "Ei". Kagoshima-ken Ibusuki-shi Nishigata Eikichi is an unknown place name in the era of recordation. It is distributed in the same place. Ooita-ken Nakatsu-shi Kamiyanaga (formerly Miyanaga) was a place name with a record since the Muromachi Period. It is distributed in the same place.