Nakajima 【中島】7 The Japanese surnames etymology dictionary.
② Abstract . Abbreviation for Tomono. Fukushima-ken Aidzuwakamatsu-shi In Kaedo Town, he tells that he abbreviated the war in 1589 (Tensho 17) and abbreviated the accompanying surname after coming home. 伴野 reference.
③ Convention . Abbreviation for semi-pile. Fukushima-ken Souma-shi Nakamura was in the Edo period in the Samma Nakamura Samurai of the Clan Office. The same samurai told that in 1607 (Keicho 12 years) it changed from a half-samen name. 半杭 reference.