Igo 【井後】4 The Japanese surnames etymology dictionary.
① There is surname of 井島 .
② Topography . "Island" is added to I, which is the surname of the Kamoshima-ken Amami archipelago. Estimated at the time of returning to Japan in 1953. Kagoshima-ken Ooshima-gun Setouchi-chou There is distribution in the Ikebana. 伊 reference.