The name Suyu-dong belonged to Dong-bu during the 5th year of King Taejo (1396), and later, in the 27th year of King Yeongjo of the Joseon dynasty (1751), it was recorded in the Suseong book 'Doseong-samgun-bungye-chongrok' as part of Dong-bu Sungshin-bang (outside the capital castle). Gaori-gye, Suyuchon-gye, and Wooi-gye under Eo-yeong-cheong, and contributed as a defending area for the capital castle. The name Suyu-dong originates from 'su,' meaning water, and 'yu,' meaning overflowing, due to frequent floods from Mountain Triangle to this area. In Korean, it means water overflowing, hence it was called 'Muneomi'.

Bbalae-gol This area, located around 486 beonji of Suyu-dong, was called 'Muneomi' due to the excessive water flowing from Samgaksan Mountain. The overflowing water naturally led to the formation of a village, and people from nearby areas would come to wash clothes and rest. Palace maids also used this location for washing clothes, which is how the name Bbalae-gol (washing clothes hill) originated. This name is still widely used today.

Gao-ri During the Joseon dynasty, the city wall was built in Hanyang (the former name of Seoul), and the area was designated up to 10 ri (a traditional Korean unit of distance). The topography of Gao-ri differed from other areas, and an additional 5 ri extended to Ui-dong, which became part of the designated capital area. Thus, the name Gao-ri, meaning '5 more ri,' originated.