The neighborhood Jungnim-dong got its name by combining parts of "Yakjeonjung-dong" and "Hanrim-dong". Yakjeonjung-dong was named after its historical role as a medicine supplier in Jangan during the Joseon period. Hanrim-dong was named after the Lee Jung-am family, whose three brothers all resided there and served in the Hanrim government during the same period. Other old village names in the area include Gaundong-mal, Hanrim-gol, and Hyungjeumulgol.
"Mapo Information". The chart of Beopjeong-dong assigned by Haengjeong-dong (행정동별 관할 법정동 일람표) (in Korean). Mapo District Official website. Archived from the original on 2007-11-05.